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Question:

John paints blue spots on his car. He usually paints these blue spots in pairs. If the total count of blue spots is 72, how many pairs of blue spots are there?

A 36
Explaination

"Pairs of blue spots" means two at a time. If the total count of blue spots is 72, dividing by 2 will give us the number of pairs. $8787_w91_h13.png$
There are 36 pairs of blue spots.