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# Math Revolution Daily quizzes

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Math Revolution GMAT Instructor
Joined: 16 Aug 2015
Posts: 7230
GMAT 1: 760 Q51 V42
GPA: 3.82
Math Revolution Daily quiz (Day 25)  [#permalink]

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02 Dec 2016, 01:24
Math Revolution Daily quiz (Day 25)

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MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
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"Only $149 for 3 month Online Course" "Free Resources-30 day online access & Diagnostic Test" "Unlimited Access to over 120 free video lessons - try it yourself" Math Revolution GMAT Instructor Joined: 16 Aug 2015 Posts: 7230 GMAT 1: 760 Q51 V42 GPA: 3.82 Math Revolution Daily quiz (Day 26) [#permalink] ### Show Tags 05 Dec 2016, 01:03 Math Revolution Daily quiz (Day 26) Attachment: 12.5.png [ 48.37 KiB | Viewed 438 times ] Attachment: 12.5(A).png [ 50.57 KiB | Viewed 438 times ] Just ​spare 15 minutes to study each day, and you will be amazed by significant improvement in GMAT Math! “If you like this question, consider subscribing to our 15 minutes a Day Daily Quiz" Receive "Up-To-Date" 5 math questions ​and solutions ​ everyday through e-mail http://mathrevolution.com/gmat/daily_quiz _________________ MathRevolution: Finish GMAT Quant Section with 10 minutes to spare The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy. "Only$149 for 3 month Online Course"
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Math Revolution GMAT Instructor
Joined: 16 Aug 2015
Posts: 7230
GMAT 1: 760 Q51 V42
GPA: 3.82
Math Revolution Daily quiz (Day 27)  [#permalink]

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Updated on: 09 Jan 2017, 23:06
Math Revolution Daily quiz (Day 27)

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Just ​spare 15 minutes to study each day, and you will be amazed by significant improvement in GMAT Math!

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MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
"Only $149 for 3 month Online Course" "Free Resources-30 day online access & Diagnostic Test" "Unlimited Access to over 120 free video lessons - try it yourself" Originally posted by MathRevolution on 06 Dec 2016, 01:37. Last edited by MathRevolution on 09 Jan 2017, 23:06, edited 1 time in total. Manager Joined: 17 Mar 2015 Posts: 116 Re: Math Revolution Daily quiz (Day 27) [#permalink] ### Show Tags 06 Dec 2016, 01:51 1) Solving the inequality gives us $$x \in (-1;0) u (0;1)$$. Option 1 and Option 2 include both the solutions and non-solutions, making them insufficient. Combination of (1) and (2) give us the exact interval, where the inequality holds. C it is. Math Revolution GMAT Instructor Joined: 16 Aug 2015 Posts: 7230 GMAT 1: 760 Q51 V42 GPA: 3.82 Math Revolution Daily quiz (Day 29) [#permalink] ### Show Tags 08 Dec 2016, 01:32 Math Revolution Daily quiz (Day 29) Attachment: 12.8.png [ 48.29 KiB | Viewed 482 times ] Attachment: 12.8(a).png [ 65.97 KiB | Viewed 481 times ] Just ​spare 15 minutes to study each day, and you will be amazed by significant improvement in GMAT Math! “If you like this question, consider subscribing to our 15 minutes a Day Daily Quiz" Receive "Up-To-Date" 5 math questions ​and solutions ​ everyday through e-mail http://mathrevolution.com/gmat/daily_quiz _________________ MathRevolution: Finish GMAT Quant Section with 10 minutes to spare The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy. "Only$149 for 3 month Online Course"
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"Unlimited Access to over 120 free video lessons - try it yourself"
Math Revolution GMAT Instructor
Joined: 16 Aug 2015
Posts: 7230
GMAT 1: 760 Q51 V42
GPA: 3.82
Math Revolution Daily quiz (Day 30)  [#permalink]

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09 Dec 2016, 01:37
Math Revolution Daily quiz (Day 30)

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Just ​spare 15 minutes to study each day, and you will be amazed by significant improvement in GMAT Math!

“If you like this question, consider subscribing to our 15 minutes a Day Daily Quiz"

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_________________
MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
"Only $149 for 3 month Online Course" "Free Resources-30 day online access & Diagnostic Test" "Unlimited Access to over 120 free video lessons - try it yourself" Math Revolution GMAT Instructor Joined: 16 Aug 2015 Posts: 7230 GMAT 1: 760 Q51 V42 GPA: 3.82 Math Revolution Daily quiz (Day 31) [#permalink] ### Show Tags 12 Dec 2016, 01:08 Math Revolution Daily quiz (Day 31) Attachment: 12.12.png [ 40.8 KiB | Viewed 478 times ] Attachment: 12.12(a).png [ 41.65 KiB | Viewed 478 times ] Just ​spare 15 minutes to study each day, and you will be amazed by significant improvement in GMAT Math! “If you like this question, consider subscribing to our 15 minutes a Day Daily Quiz" Receive "Up-To-Date" 5 math questions ​and solutions ​ everyday through e-mail http://mathrevolution.com/gmat/daily_quiz _________________ MathRevolution: Finish GMAT Quant Section with 10 minutes to spare The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy. "Only$149 for 3 month Online Course"
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Math Revolution GMAT Instructor
Joined: 16 Aug 2015
Posts: 7230
GMAT 1: 760 Q51 V42
GPA: 3.82
Math Revolution Daily quiz (Day 32)  [#permalink]

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13 Dec 2016, 01:20
Math Revolution Daily quiz (Day 32)

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Just ​spare 15 minutes to study each day, and you will be amazed by significant improvement in GMAT Math!

“If you like this question, consider subscribing to our 15 minutes a Day Daily Quiz"

Receive "Up-To-Date" 5 math questions ​and solutions ​ everyday through e-mail

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_________________
MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
"Only $149 for 3 month Online Course" "Free Resources-30 day online access & Diagnostic Test" "Unlimited Access to over 120 free video lessons - try it yourself" Math Revolution GMAT Instructor Joined: 16 Aug 2015 Posts: 7230 GMAT 1: 760 Q51 V42 GPA: 3.82 Math Revolution Daily quiz (Day 33) [#permalink] ### Show Tags 14 Dec 2016, 01:08 Math Revolution Daily quiz (Day 33) Attachment: 12.14.png [ 52.91 KiB | Viewed 512 times ] Attachment: 12.14(a).png [ 41.31 KiB | Viewed 512 times ] Just ​spare 15 minutes to study each day, and you will be amazed by significant improvement in GMAT Math! “If you like this question, consider subscribing to our 15 minutes a Day Daily Quiz" Receive "Up-To-Date" 5 math questions ​and solutions ​ everyday through e-mail http://mathrevolution.com/gmat/daily_quiz _________________ MathRevolution: Finish GMAT Quant Section with 10 minutes to spare The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy. "Only$149 for 3 month Online Course"
"Free Resources-30 day online access & Diagnostic Test"
"Unlimited Access to over 120 free video lessons - try it yourself"
Math Revolution GMAT Instructor
Joined: 16 Aug 2015
Posts: 7230
GMAT 1: 760 Q51 V42
GPA: 3.82
Math Revolution Daily quiz (Day 34)  [#permalink]

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15 Dec 2016, 01:09
Math Revolution Daily quiz (Day 34)

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Just ​spare 15 minutes to study each day, and you will be amazed by significant improvement in GMAT Math!

“If you like this question, consider subscribing to our 15 minutes a Day Daily Quiz"

Receive "Up-To-Date" 5 math questions ​and solutions ​ everyday through e-mail

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_________________
MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
"Only $149 for 3 month Online Course" "Free Resources-30 day online access & Diagnostic Test" "Unlimited Access to over 120 free video lessons - try it yourself" Math Revolution GMAT Instructor Joined: 16 Aug 2015 Posts: 7230 GMAT 1: 760 Q51 V42 GPA: 3.82 Math Revolution Daily quiz (Day 35) [#permalink] ### Show Tags 16 Dec 2016, 03:24 Math Revolution Daily quiz (Day 35) Attachment: 12.16.png [ 47.38 KiB | Viewed 499 times ] Attachment: 12.16(a).png [ 42.57 KiB | Viewed 499 times ] Just ​spare 15 minutes to study each day, and you will be amazed by significant improvement in GMAT Math! “If you like this question, consider subscribing to our 15 minutes a Day Daily Quiz" Receive "Up-To-Date" 5 math questions ​and solutions ​ everyday through e-mail http://mathrevolution.com/gmat/daily_quiz _________________ MathRevolution: Finish GMAT Quant Section with 10 minutes to spare The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy. "Only$149 for 3 month Online Course"
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"Unlimited Access to over 120 free video lessons - try it yourself"
Math Revolution GMAT Instructor
Joined: 16 Aug 2015
Posts: 7230
GMAT 1: 760 Q51 V42
GPA: 3.82
Math Revolution Daily quiz (Day 36)  [#permalink]

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19 Dec 2016, 00:24
Math Revolution Daily quiz (Day 36)

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Just ​spare 15 minutes to study each day, and you will be amazed by significant improvement in GMAT Math!

“If you like this question, consider subscribing to our 15 minutes a Day Daily Quiz"

Receive "Up-To-Date" 5 math questions ​and solutions ​ everyday through e-mail

http://mathrevolution.com/gmat/daily_quiz

_________________
MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
"Only $149 for 3 month Online Course" "Free Resources-30 day online access & Diagnostic Test" "Unlimited Access to over 120 free video lessons - try it yourself" Math Revolution GMAT Instructor Joined: 16 Aug 2015 Posts: 7230 GMAT 1: 760 Q51 V42 GPA: 3.82 Math Revolution Daily quiz (Day 37) [#permalink] ### Show Tags Updated on: 09 Jan 2017, 23:14 Math Revolution Daily quiz (Day 37) Attachment: 12.20.png [ 57.77 KiB | Viewed 521 times ] Attachment: 12.20(a).png [ 71.76 KiB | Viewed 521 times ] Just ​spare 15 minutes to study each day, and you will be amazed by significant improvement in GMAT Math! “If you like this question, consider subscribing to our 15 minutes a Day Daily Quiz" Receive "Up-To-Date" 5 math questions ​and solutions ​ everyday through e-mail http://mathrevolution.com/gmat/daily_quiz _________________ MathRevolution: Finish GMAT Quant Section with 10 minutes to spare The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy. "Only$149 for 3 month Online Course"
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Originally posted by MathRevolution on 20 Dec 2016, 01:33.
Last edited by MathRevolution on 09 Jan 2017, 23:14, edited 1 time in total.
Math Revolution GMAT Instructor
Joined: 16 Aug 2015
Posts: 7230
GMAT 1: 760 Q51 V42
GPA: 3.82
Math Revolution Daily quiz (Day 38)  [#permalink]

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21 Dec 2016, 01:39
Math Revolution Daily quiz (Day 38)

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Just ​spare 15 minutes to study each day, and you will be amazed by significant improvement in GMAT Math!

“If you like this question, consider subscribing to our 15 minutes a Day Daily Quiz"

Receive "Up-To-Date" 5 math questions ​and solutions ​ everyday through e-mail

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_________________
MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
"Only $149 for 3 month Online Course" "Free Resources-30 day online access & Diagnostic Test" "Unlimited Access to over 120 free video lessons - try it yourself" Math Revolution GMAT Instructor Joined: 16 Aug 2015 Posts: 7230 GMAT 1: 760 Q51 V42 GPA: 3.82 Math Revolution Daily quiz (Day 39) [#permalink] ### Show Tags 22 Dec 2016, 00:47 1 Math Revolution Daily quiz (Day 39) Attachment: 12.22.png [ 55.78 KiB | Viewed 554 times ] Attachment: 12.22(a).png [ 61.1 KiB | Viewed 554 times ] Just ​spare 15 minutes to study each day, and you will be amazed by significant improvement in GMAT Math! “If you like this question, consider subscribing to our 15 minutes a Day Daily Quiz" Receive "Up-To-Date" 5 math questions ​and solutions ​ everyday through e-mail http://mathrevolution.com/gmat/daily_quiz _________________ MathRevolution: Finish GMAT Quant Section with 10 minutes to spare The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy. "Only$149 for 3 month Online Course"
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Joined: 27 Aug 2016
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Location: India
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WE: Engineering (Energy and Utilities)
Re: Math Revolution Daily quiz (Day 37)  [#permalink]

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22 Dec 2016, 08:57
MathRevolution wrote:
Math Revolution Daily quiz (Day 37)

Just ​spare 15 minutes to study each day, and you will be amazed by significant improvement in GMAT Math!

“If you like this question, consider subscribing to our 15 minutes a Day Daily Quiz"

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My approach got me the answers as "either statement alone" i.e. "D"
From stat 1) n/8 = ax+3, implying n = 8ax + 24, implying n/6 = 3/2 (ax) + 4, 3/2 (ax) shall always give 1 as remainder therefore total remainder = 5...Suff.
From stat 2) (n-1)/9 = ax+8, implies n-1 = 9ax + 72, implies (n-1)/6 = 3/2(ax) + 12, 3/2 (ax) shall always give 1 as remainder whereas 12 is divisible terefore remiander = 1...suff

Therefore "D"

where did I go wrong:(
Math Revolution GMAT Instructor
Joined: 16 Aug 2015
Posts: 7230
GMAT 1: 760 Q51 V42
GPA: 3.82
Math Revolution Daily quiz (Day 40)  [#permalink]

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23 Dec 2016, 00:48
Math Revolution Daily quiz (Day 40)

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Just ​spare 15 minutes to study each day, and you will be amazed by significant improvement in GMAT Math!

“If you like this question, consider subscribing to our 15 minutes a Day Daily Quiz"

Receive "Up-To-Date" 5 math questions ​and solutions ​ everyday through e-mail

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_________________
MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
"Only $149 for 3 month Online Course" "Free Resources-30 day online access & Diagnostic Test" "Unlimited Access to over 120 free video lessons - try it yourself" Math Revolution GMAT Instructor Joined: 16 Aug 2015 Posts: 7230 GMAT 1: 760 Q51 V42 GPA: 3.82 Re: Math Revolution Daily quiz (Day 37) [#permalink] ### Show Tags 25 Dec 2016, 18:17 saurabhsavant Hello, In fact, "n/8 = ax+3,(n-1)/9 = ax+8" is incorrect. It is supposed to be shown as "n=8p+3 and n-1=9q+8". _________________ MathRevolution: Finish GMAT Quant Section with 10 minutes to spare The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy. "Only$149 for 3 month Online Course"
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Manager
Joined: 27 Aug 2016
Posts: 89
Location: India
Schools: HEC Montreal '21
GMAT 1: 670 Q47 V37
GPA: 3
WE: Engineering (Energy and Utilities)
Re: Math Revolution Daily quiz (Day 37)  [#permalink]

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27 Dec 2016, 11:05
MathRevolution wrote:
saurabhsavant

Hello,

In fact, "n/8 = ax+3,(n-1)/9 = ax+8" is incorrect. It is supposed to be shown as "n=8p+3 and n-1=9q+8".

Aaarrgghhh...what a stupid mistake, thanx a ton for making it clear.
Math Revolution GMAT Instructor
Joined: 16 Aug 2015
Posts: 7230
GMAT 1: 760 Q51 V42
GPA: 3.82
Re: Math Revolution Daily quiz (Day 37)  [#permalink]

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10 Jan 2017, 23:01
saurabhsavant wrote:
MathRevolution wrote:
Math Revolution Daily quiz (Day 37)

Just ​spare 15 minutes to study each day, and you will be amazed by significant improvement in GMAT Math!

“If you like this question, consider subscribing to our 15 minutes a Day Daily Quiz"

Receive "Up-To-Date" 5 math questions ​and solutions ​ everyday through e-mail

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My approach got me the answers as "either statement alone" i.e. "D"
From stat 1) n/8 = ax+3, implying n = 8ax + 24, implying n/6 = 3/2 (ax) + 4, 3/2 (ax) shall always give 1 as remainder therefore total remainder = 5...Suff.
From stat 2) (n-1)/9 = ax+8, implies n-1 = 9ax + 72, implies (n-1)/6 = 3/2(ax) + 12, 3/2 (ax) shall always give 1 as remainder whereas 12 is divisible terefore remiander = 1...suff

Therefore "D"

where did I go wrong:(

Hi saurabhsavant,

Condition 1)
You shouldn't write n/8 = ax + 3 and so n = 8ax + 24 = 8(ax + 3).
It doesn't mean that its remainder is 3 when n is divided by 8, but it means n is multiple of 8.
It should be expressed by n = 8a + 3

Condition 2)
You shouldn't write (n-1)/9 = ax + 8. It means n - 1 = 9 * ( ax + 8 ) and the remainder of n - 1 is 0 when n - 1 is divided by 9
It should be expressed by n - 1 = 9b + 8

Happy Studying!
Math Revolution
_________________
MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
"Only \$149 for 3 month Online Course"
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"Unlimited Access to over 120 free video lessons - try it yourself"
Re: Math Revolution Daily quiz (Day 37)   [#permalink] 10 Jan 2017, 23:01

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