instruction:
The task is to generate the correct answer for a given math problem.
question:
Problem: if a = 105 and a ^ 3 = 21 × 25 × 45 × z , what is the value of z ?
answer:
49


question:
Problem: the s . i . on a certain sum of money for 2 years at 8 % per annum is half the c . i . on rs . 4000 for 2 years at 10 % per annum . the sum placed on s . i . is ?
answer:
262


question:
Problem: the sum of the squares of three numbers is 138 , while the sum of their products take two at a time is 131 . find the sum ?
answer:

20