instruction:
The task is to generate the correct answer for a given math problem.
question:
Problem: if the average ( arithmetic mean ) of a and b is 45 and the average of b and c is 80 , what is the value of c − a ?
answer:
60


question:
Problem: how many integers k greater than 100 and less than 700 are there such that if the hundreds and the unit digits of k are reversed , the resulting integer is k + 99 ?
answer:
50


question:
Problem: if n = ( 33 ) ^ 43 + ( 53 ) ^ 33 what is the units digit of n ?
answer:

4