Question

Find the number of all the 3-digit numbers which are divisible by 2 but not divisible by 10.

Answer 1

They're a lot like 104, 212, 526, 618 etc

Explanation:

104÷2=52

104÷10=10 with a remainder 4

212÷2=106

212÷10=21 with a remainder 2

526÷2=263

526÷10=52 with a remainder 6

618÷2=309

618÷10=61 with a remainder of 8