instruction:
The task is to generate the correct answer for a given math problem.
question:
Problem: a person was asked to subtract 25 % of a number from the original but he subtracted 25 from the number . his answer was 25 more than correct one . what was the original number ?
answer:
200


question:
Problem: assume that f ( 1 ) = 0 and f ( m + n ) = f ( m ) + f ( n ) + 4 ( 9 mn - 1 ) . for all natural numbers ( integers > 0 ) m and n . what is the value of f ( 17 ) ?
answer:
4832


question:
Problem: how many 3 - digit numbers abc , in which a , b , and c are each digits , satisfy the equation 2 b = a + c ?
answer:

45