Question 1
Kenji is twice as old as Deepti was 4 years ago. The difference between their ages is 23 years. How old is Kenji?
Let Deepti's current age = x
Then 4 years ago, Deepti was (x - 4)
Kenji = 2(x - 4) = 2x - 8
Difference: Kenji - x = (2x - 8) - x = x - 8
Given difference = 23
So x - 8 = 23 → x = 31 = 31
Then Kenji = 2(31 - 4) = 54
Then 4 years ago, Deepti was (x - 4)
Kenji = 2(x - 4) = 2x - 8
Difference: Kenji - x = (2x - 8) - x = x - 8
Given difference = 23
So x - 8 = 23 → x = 31 = 31
Then Kenji = 2(31 - 4) = 54