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Rob is twice as old as Jodie is now. In 10 years, Rob will be 20 years older than Jodie is at that time. How old is Jodie now?

A. 10
B. 20
C. 30
D. 40
E. 50

Let Rob = R and Jodie be J

R= 2*J

In 10 years from now, Rob will be 20 years older than Jodie is at that time

R+10 = J+10+20;
R+10= J+30

Substitute R= 2J

2J +10= J+30
Therefore, J = 20

Answer option - B
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Current Age of Jodie = j, Current age of Rob = r
Currently: r = 2j ....... Eq 1
In 10 Years: r+10 = 20+(j+10) ==> 2j+10 = 20+j+10 ==> j = 20 .... ANSWER = B
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Bunuel
Rob is twice as old as Jodie is now. In 10 years, Rob will be 20 years older than Jodie is at that time. How old is Jodie now?

A. 10
B. 20
C. 30
D. 40
E. 50

R = 2J

R + 10 = 20 + (J + 10)

2J + 10 = 30 + J

J = 20

To confirm this

Rob = 2*20 = 40

In 10 years he will be 50 and Jodie will be 30

Answer choice B

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Bunuel
Rob is twice as old as Jodie is now. In 10 years, Rob will be 20 years older than Jodie is at that time. How old is Jodie now?

A. 10
B. 20
C. 30
D. 40
E. 50

We can let R = Rob’s current age and J = Jodie’s current age and create the equation:

R = 2J

In 10 years, Rob will be (R + 10) years old, and Jodie will be (J + 10) years old, and Rob will be 20 years older than Jodie at that time. Thus, we have:

R + 10 = J + 10 + 20

R = J + 20

Substituting, we have:

2J = J + 20

J = 20

Answer: B
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