Question 1
Yamini is twice as old as Pankaj was 7 years ago. The difference between their ages is 4 years. How old is Yamini?
Let Pankaj's current age = x
Then 7 years ago, Pankaj was (x - 7)
Yamini = 2(x - 7) = 2x - 14
Difference: Yamini - x = (2x - 14) - x = x - 14
Given difference = 4
So x - 14 = 4 → x = 18 = 18
Then Yamini = 2(18 - 7) = 22
Then 7 years ago, Pankaj was (x - 7)
Yamini = 2(x - 7) = 2x - 14
Difference: Yamini - x = (2x - 14) - x = x - 14
Given difference = 4
So x - 14 = 4 → x = 18 = 18
Then Yamini = 2(18 - 7) = 22