find the iq for whose chronological age is 15 and whose mental age is the following: 10,14,15,19 and 25?

Answer 1

IQ is actually computed slightly differently than this, but here's the simple formula:

(mental age)/(chronological age) * 100

So, 67 and 93 and 100 and 127 and 167

Answer 2

intelligence QUOTIENT is a fraction, mental age over chronological age, so divide each mental age by 15 and then multiply by 100 to make them percents:
10/15 = 67
14/15 = 93
15/15 = 100
19/15 = 127
25/15 = 167