The task is to generate the correct answer for a given math problem.

Problem: the sum of ages of 5 children born 1 years different each is 30 years . what is the age of the elder child ?
8

Problem: two numbers are in the ratio 3 : 5 . if 9 be subtracted from each , they are in the ratio of 1 : 2 . the first number is :
a ) 27

Problem: at what rate percent on simple interest will rs . 1750 amount to rs . 2000 in 3 years ?

4.76 %