Find all numbers between 1 and 55 that are divisible by 5 and then add 4 to each number.
5,10,15,20,25,30,35,40,45,50,55
9,14,19,24,29,34,39,44,49,54,59(59 can't be used because it's greater than 55)
answer:10
Another solution...
Find all numbers divisible by 5 and then subtract 1 from each number.
5,10,15,20,25,30,35,40,45,50,55
4(can't be used because no number less than 4 is divisible by 5 except 0),9,14,19,24,29,34,39,44,49,54
answer:10
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