instruction:
The task is to generate the correct answer for a given math problem.
question:
Problem: the ratio of a to b is 4 to 5 , where a and b are positive . if x equals a increased by 25 percent of a , and m equals b decreased by 60 percent of b , what is the value of m / x ?
answer:
2 / 5


question:
Problem: if s and t are both odd prime numbers ands < t , then how many different positive integer factors does 2 sthave ?
answer:
8


question:
Problem: if a is a positive integer , and if the units digit of a ^ 2 is 9 and the units digit of ( a + 1 ) ^ 2 is 4 , what is the units g digit of ( a + 2 ) ^ 2 ?
answer:

1