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Biswadeep20
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Practice Questions Chat 25 Aug 2023, 23:39
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manav12222
Can you elaborate
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Sure. The question asks to determine is k a multiple of 10 indicating any number divided by 10 will result in an integer.

Statement 1: k^2+1 is a prime number. Keep listing few numbers that match this criteria. We get 2^2+1(2 is k), 6^2+1(6 is k), 10^2+1(10 is k) and so on. Each of these k^2+1 is a prime no. But we may may not divide the k by 10 as 2 and 6 surely won’t get divisible by 10, while 10 would. Insufficient

Statement 2: 2k is divisible by 5 indicates 2k can be 10, 20, 30, 40..... So k would be 5, 10, 15......
Clearly 5 isn’t divisible by 10, but 10 is. Insufficient.

Combining, we see only 10 is the common number. Similarly 20, 30,.... all will be the common numbers. So all these numbers are multiples of 10. Choice C is the correct choice.
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jmitesh69
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Ami0Trafalgar
i’m getting 212 can you explain how did you get 215?
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Fourt digit numbers greater than 4000
Starting with different number in units place, the first three digits can be 4,5,6,7,8,9 and units place can be 0 to 9. However it shouldn’t be same so 6 x 9= 54 such numbers.
Same way for different number in tens and hundredth place, 54 numbers each.

Now for different number in thousands place, for 5,6,7,8,9 the rest three can be 0 to 9 except the same digit. So 9x5= 45 numbers.
For 4, the rest three all except 0 and 4, since it should be greater than 4000. So 8 more numbers.

So 54+54+54+45+8=215
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Ami0Trafalgar
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jmitesh69
Fourt digit numbers greater than 4000 Starting with different number in units place, the first three digits can be 4,5,6,7,8,9 and units place can be 0 to 9. However it shouldn’t be same so 6 x 9= 54 such numbers. Same way for different number in tens and hundredth place, 54 numbers each. Now for different number in thousands place, for 5,6,7,8,9 the rest three can be 0 to 9 except the same digit. So 9x5= 45 numbers. For 4, the rest three all except 0 and 4, since it should be greater than 4000. So 8 more numbers. So 54+54+54+45+8=215
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My bad i forgot to account for 0 in the case where the scheme can be (4x44, 44x4, 444x)
Thank you!
Need to avoid these stupid mistakes smh
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avaniguptaonly
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The coordinates of points A and C are (0, -3) and (3, 3), respectively. If point B lies on line AC between points A and C, and if AB = 2BC, which of the following represents the coordinates of point B?

A. (1, -√5)
B. (1, -1)
C. (2, 1)
D. (1.5, 0)
E. (√5, √5)
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13Gopal
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avaniguptaonly
The coordinates of points A and C are (0, -3) and (3, 3), respectively. If point B lies on line AC between points A and C, and if AB = 2BC, which of the following represents the coordinates of point B? A. (1, -√5) B. (1, -1) C. (2, 1) D. (1.5, 0) E. (√5, √5)
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In our case AND (x1 y1) = (0,-3) (x2 y2) = (3, 3)

X Coordinate = ----------> ---------> 2

y Coordinate = ----------> ---------> 1

Hence B (x y) = 2, 1
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Anushka2023
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Does anybody has GMAT OG 2023?
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19Ishasha
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Biswadeep20
Sure. The question asks to determine is k a multiple of 10 indicating any number divided by 10 will result in an integer. Statement 1: k^2+1 is a prime number. Keep listing few numbers that match this criteria. We get 2^2+1(2 is k), 6^2+1(6 is k), 10^2+1(10 is k) and so on. Each of these k^2+1 is a prime no. But we may may not divide the k by 10 as 2 and 6 surely won’t get divisible by 10, while 10 would. Insufficient Statement 2: 2k is divisible by 5 indicates 2k can be 10, 20, 30, 40..... So k would be 5, 10, 15...... Clearly 5 isn’t divisible by 10, but 10 is. Insufficient. Combining, we see only 10 is the common number. Similarly 20, 30,.... all will be the common numbers. So all these numbers are multiples of 10. Choice C is the correct choice.
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Shouldn’t the answer be E? If K=50, then K^2 +1 will be 2501 which is not a prime number.
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vvkgrg
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19Ishasha
Shouldn’t the answer be E? If K=50, then K^2 +1 will be 2501 which is not a prime number.
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Think about it like this:
K is positive integer
1) k satisfies first condition ie k^2+1 os prime
2) 2k i divisible by 5

Then see if k is a multiple of 10

From 1) condition, as all prime number except 2 are odd, therefore k is even, meaning k is a multiple of 2
From 2) k is a multiple of 5
Taking both statements together results in k is a multiple of 10. Thus answer is c



As per your example you took k =50 which does not satisfy 1)
So you can’t take k as 50
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19Ishasha
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Practice Questions Chat 26 Aug 2023, 08:32
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vvkgrg, thanks 👍
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saurabhstcp
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can someone tell me what are requirements for gmatonline

i am thinking of taking gmat form my laptop

i have a small whiteboard

what do i need more
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lowkyprofessional
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Check the size of white. Should not exceed (30 x 50) cm. From laptop should be fine. Sit in a corner from where your background is visible to the proctor. Ensure the table doesn’t have anything except the board, markers and an eraser. Metal water bottles are not allowed. Take a clean transparent plastic or glass water bottle.
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saurabhstcp
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ok

so water is allowed

what about breaks

after section

can i go to washroom

after one section
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lowkyprofessional
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Practice Questions Chat 26 Aug 2023, 10:23
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You are allowed to use the washroom during the break. For every break you take you will have to give the proctor a 360 tour of the room and the table when you return to the table.
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Arpit_Bhardwaj
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Practice Questions Chat 26 Aug 2023, 14:16
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19Ishasha
Shouldn’t the answer be E? If K=50, then K^2 +1 will be 2501 which is not a prime number.
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Hi 19Ishasha, we have to determine which statements are neccesary to answer the asked question. Now k=50 doesnt satisfy first statement, it just satisfies second statement and the answer is C which states that both statements are neccessary to answer the asked question. Hence the answer cannot be E.
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SaimKhan007
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Can anyone please tell me from where do I prepare my quant portion cause I really don’t know anything about maths it’s like I have to start from zero

Can anyone please guide me?
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gmatophobia
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SaimKhan007
Can anyone please tell me from where do I prepare my quant portion cause I really don’t know anything about maths it’s like I have to start from zero
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You may consider checking the below links

ALL YOU NEED FOR QUANT ! ! !
Ultimate GMAT Quantitative Megathread

Hope this helps.
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Arpit_Bhardwaj
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Practice Questions Chat 26 Aug 2023, 14:35
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19Ishasha
Shouldn’t the answer be E? If K=50, then K^2 +1 will be 2501 which is not a prime number.
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For the solution of the DS question.

Lets analize the second statement first

Statement says that 2*k is divisible by 5 and that means that k= 5*x

Now x can be even or odd.

For k= odd

this would mean that k^2+1 is even which means that this doesnt satify first condition.

So k has to be even. And even means k has to be a multiple of 10.

So using both these statements we can make out if k is a multiple of 10 or not

Hence C is the answer.
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Arpit_Bhardwaj
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Practice Questions Chat 26 Aug 2023, 15:49
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For x= odd ** Sorry for the typo in the above solution
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abhishek12321
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Practice Questions Chat 27 Aug 2023, 07:19
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What is the value of x , a positive integer, if ( x ) ^.33/4 = 20.25/( x )^2.67 ?

Cn you explain?
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Practice Questions Chat 27 Aug 2023, 10:23
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Hi Guys,
I have a complete set of Official GMAT practice tests from Practice Tests 3-6(Old edition - Purchased as a bundle) which I didn’t get a chance to use. I decided to pursue other routes so taking a break from GMAT, hence I decided to put these tests up for sale for lesser price so others can make good use. These tests are absolutely untouched(I’d rather say never taken that opportunity :) ). If you’re interested to purchase please DM me in wapp - +91 63017 96974
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