15 = 5 times 3
15 = 5 + 5 + 5
15 = 7 + 7 + 1
15 = 45 - 30
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60
Using the information i nthe question... 15 + 24 is equal to half of the number. 15 + 24 = 39. So, 39 x 2 = 78, so 78 is the number (7 + 8 do equal 15)
42
It is 15.
0.15 is a decimal number which is equal to 15/100ths