find the number when 15 is added to a number , the sum is 65
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Step-by-step explanation:
Therefore the average sum of three numbers is 45:3=15. The number 15 is called the magic number of the 3x3 square. You can also achieve 15, if you add the middle number 5 three times. The odd numbers 1,3,7, and 9 occur twice in the reductions, the even numbers 2,4,6,8 three times and the number 5 once.
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Answer:
15+x=65
x= 65-15
x= 50
Hope it helps and to everyone
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