Question

Olivia's age is a 1 digit number which is multiple of 2 and divisible by 4. Also she is elder than 5 years old. How old is she?

Answer 1

Olivia's age is a multiple of 2.
Multiples of 2: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22.......

Out of which are divisible by 4: 4, 8, 12, 16.....
Given condition: Olivia's age is a one-digit number, so exclude the two-digit numbers. Now possible numbers are 4 and 8.

And she is elder than 5 years old. So exclude the number 4 which is less than 5.

Hence, Oiliva's age is 8.