Question

Fernando’s birthday is on March 21st. On March 9th, Fernando’s father said that he will give Fernando $5 on each date that is divisible by 4 until his birthday. On Fernando’s birthday, his father will give him $10 more than his new age. In all, Fernando will receive $40 from his father. How old will Fernando turn on his birthday?

Answer 1

15 years

Explanation:

Days divisible by 4 between 9th and 21st (12, 16,20). = 3

Assume, New age = x

(3 * 5) + (10 + x) = 40

15 + 10 + x = 40

25 + x = 40

x = 40 - 25

x = 15 years

Hence, Fernando will be 15 years