Medium
A two-digit number divided by another two-digit number gives 6.25. What do we get if we multiply these two numbers?
Explanation
Explanation
6.25 = 25/4, so the two numbers can be represented as 25k and 4k for some integer k. Testing k=3 gives 75 and 12 (both two-digit numbers, with 75/12=6.25). Their product = 75 x 12 = 900.
PRO TIP
Re-check your working by substituting the answer back into the original question.