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

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

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New post 27 Aug 2018, 09:45
1
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

90% (01:10) correct 10% (01:45) wrong based on 48 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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New post 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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Re: Rob has to make 5 payments on his student loans from college. Each pay  [#permalink]

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New post 27 Aug 2018, 10:06
Going by options is the easiest way answer 50
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Re: Rob has to make 5 payments on his student loans from college. Each pay  [#permalink]

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

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

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