Question

How old will Green be 10 years from now?

• A. 17
• B. 8
• C. 18
• D. none of these

Answer 1

The correct option is C 18

Let y1,y2......be the indefinite years. Let "t" be the year blue was born, "j" green and m yellow. Let y be the current year.

y-8-m=1/2(y2-j)=1-y3-ty3-m=5(y+2-t)..............(1)

y+10-t=2(y1-j)y1-m=9(y1-t).................(2)

t+1-m=3+y4-ty4-j=3(y5-6-m)

y5-j=1/2(y6-t)y6-m=10+y7-my7-j=1/3(y8-t)y8-m=3(j-m)

t=y-3j=y-8m=y-15

Therefore, green=8years

blue= 3years

yellow = 15 years