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Question:

Jamie collects 300 stamps one week, 420 stamps the next week, and 180 stamps the last week. He can trade the stamps for collector coins. If 25 stamps earn him one coin, how many coins can Jamie collect?

A 36
Explaination

The total number of stamps collected is 300 + 420 + 180 = 900. The number of coins that can be collected is 900/25= 36.