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In three years, Skippy's dad will be four times as old as Skippy was

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Status: No dream is too large, no dreamer is too small
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In three years, Skippy's dad will be four times as old as Skippy was  [#permalink]

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New post 30 Oct 2018, 04:45
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A
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C
D
E

Difficulty:

  25% (medium)

Question Stats:

75% (02:03) correct 25% (02:04) wrong based on 40 sessions

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In three years, Skippy's dad will be four times as old as Skippy was last year. Today, their ages add up to 48. How old is Skippy today?

a. 9

b. 10

c. 11

d. 12

e. 13

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In three years, Skippy's dad will be four times as old as Skippy was  [#permalink]

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New post 30 Oct 2018, 05:22
Baten80 wrote:
In three years, Skippy's dad will be four times as old as Skippy was last year. Today, their ages add up to 48. How old is Skippy today?

a. 9

b. 10

c. 11

d. 12

e. 13




Let us assume the following

Skippy current age= X
Skip's Dad current age = Y

Now according to the question

In three years, Skippy's dad will be four times as old as Skippy was last year.
y+3= 4(x-1)
Today, their ages add up to 48
x+ y =11

So now we have two variables and two equations.

Solving them we get X=11

So option C


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Re: In three years, Skippy's dad will be four times as old as Skippy was  [#permalink]

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New post 30 Oct 2018, 05:30
1
OA:C

Let Skippy's age today be \(S\)
Let Skippy's dad age today be \(D\)

As per Question
\(D+3=4(S-1)\)

\(D=4S-7\) ...(1)

\(D+S=48\) ...(2)

Putting the value of \(D\) from (1) into (2), we get

\(4S-7+S=48\)

\(5S-7=48\)

\(5S=55\)

\(S=11\)
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Re: In three years, Skippy's dad will be four times as old as Skippy was &nbs [#permalink] 30 Oct 2018, 05:30
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In three years, Skippy's dad will be four times as old as Skippy was

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