By repeated subtraction of odd numbers starting from 1, find whether 131 is a perfect square or not?
please help. I don't have much points. only 11. please help
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Answer - 131 isn't a perfect square.
Step-by-step explanation:
131 - 1 = 130
130 - 3 = 127
127 - 5 = 122
122 - 7 = 115
115 - 9 = 106
106 - 11 = 95
95 - 13 = 82
82 - 15 = 67
67 - 17 = 50
50 - 19 = 31
31 - 21 = 10
As 10, when subtracted by 23, gives a negative number. ∴ 131 isn't a perfect square.
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