The task is to generate the correct answer for a given math problem.

[EX Q]: Problem: in one alloy there is 12 % chromium while in another alloy it is 8 % . 35 kg of the first alloy was melted together with 40 kg of the second one to form a third alloy . find the percentage of chromium in the new alloy .
[EX A]: 9.75 %

[EX Q]: Problem: for any integer n greater than 1 , n * denotes the product of all the integers from 1 to n , inclusive . how many prime numbers are there between 6 * + 2 and 6 * + 6 , inclusive ?
[EX A]: none

[EX Q]: Problem: if the dimensions of a certain rectangular box are 5 inches by 2 inches by 3 inches , then the face of greatest area is of what area ?
[EX A]:
15 square inches', 'e ) 10 square inches'