63
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82 = 8 x 8 = 64 92 = 9 x 9 = 81 Since 72 is in between these answers 72 is not square. (The square root of 72 = 8.485281374...) There is no whole number which when multiplied by itself gives an answer of 72.
LCM of 9 and 8 and 3 is 72.
9 can go into 72 8 times. (72 / 9 = 8)
72
Just 72.