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# Rob has to make 5 payments on his student loans from college. Each pay

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Joined: 13 Apr 2013
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Location: India
GMAT 1: 480 Q38 V22
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WE: Engineering (Real Estate)
Rob has to make 5 payments on his student loans from college. Each pay  [#permalink]

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27 Aug 2018, 09:45
1
00:00

Difficulty:

5% (low)

Question Stats:

88% (01:25) correct 12% (01:58) wrong based on 51 sessions

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Rob has to make 5 payments on his student loans from college. Each payment will be twice the amount of the previous payment. If the total amount he has to pay back is $1,550, how much is Rob's first payment? 1.$10

2. $20 3.$25

4. $50 5.$75

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Re: Rob has to make 5 payments on his student loans from college. Each pay  [#permalink]

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27 Aug 2018, 09:59
1
AkshdeepS wrote:
Rob has to make 5 payments on his student loans from college. Each payment will be twice the amount of the previous payment. If the total amount he has to pay back is $1,550, how much is Rob's first payment? 1.$10

2. $20 3.$25

4. $50 5.$75

$$x + 2x + 4x + 8x + 16x = 1550$$

Or, $$x + 2x + 4x + 8x + 16x = 1550$$

Or, $$31x = 1550$$

So, $$x = 50$$, Answer must be (4)
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Joined: 13 Dec 2017
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Re: Rob has to make 5 payments on his student loans from college. Each pay  [#permalink]

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27 Aug 2018, 10:06
Going by options is the easiest way answer 50
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Joined: 29 Jul 2018
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Concentration: Finance, Statistics
GMAT 1: 620 Q45 V31
Re: Rob has to make 5 payments on his student loans from college. Each pay  [#permalink]

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28 Aug 2018, 21:41
1
x+ 2x+4x+8x+16x = 1550
31x = 1550
x = 50
or
use options
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Joined: 21 Jul 2018
Posts: 142
Re: Rob has to make 5 payments on his student loans from college. Each pay  [#permalink]

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07 Sep 2018, 03:58
If you look at options u can eliminate 4 options easily.
In the end you need zero hence C & E is not possible
U need 50 as last 2 digit which is again not possible with option A & B.
U left with only option D, plug in the value if you want to verify and you got the answer.

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Re: Rob has to make 5 payments on his student loans from college. Each pay   [#permalink] 07 Sep 2018, 03:58
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