What is the largest multiple of 7 less than 50?
One way to do this is to list the multiples of 7 in increasing order and stop when I reach or exceed 50. The multiples of 7 are 7, 14, 21, 28, 35, 42, 49, ... I can see that 49 is the largest multiple of 7 that is still less than 50. So the answer is 49.

