What is the sum of the numbers between 40 and 50, that are exactly divisible by 7.
The numbers between 40 and 50 that are exactly divisible by 7 ( those numbers that can be divided by 7, without leaving a remainder) are 42 and 49.
42=7×6
49=7×7
The sum of 42 and 49 is 91
42+49––––– 91 –––––
Hence "91" is the sum.
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