Find the sum of all two-digit numbers that are multiples of 5.

univerkov | August 1, 2021 | education

Find the sum of all two-digit numbers that are multiples of 5.
To do this, select such numbers among two-digit ones that have numbers 0 or 5 at the end (the main divisibility factor by 5).
Let’s write down all the selected numbers in order and add them together.
10 + 15 + 20 + 25 + 30 +35 + 40 + 45 + 50 + 55 + 60 + 65 + 70 + 75 + 80 + 85 + 90 + 95 = 945.

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