Which of the following is not a perfect square (solve without doing calculations)
62, 88, 49, 100
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Answer:
62, 88
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62 & 88 are not perfect squares
Step-by-step explanation:
62 = 2 * 31 Hence 62 not a square
88 = 2 * 2 * 2 * 11 = 2² * 2 * 11 Hence 88 not a square
49 = 7 * 7 = 7² Hence 49 is square
100 = 2 * 2 * 5 * 5 = 2² * 5² Hence 100 is a sqaure
not a perfect square solve without doing calculations
Square of any number ends with
1 , 4 , 5 , 6 , 9 or 00
Hence 62 & 88 are not square
but it does not give any information about 49 & 100 for being square or not
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