By repeated subtraction of odd numbers starting from 1, find whether the following numbers are perfect squares or not? If the number is a perfect square then find its square root. (1)121 (2)55 (3)36 (4)49 (5) 90
Answers
Answered by
37
1,3,4 are perfect squares.
√121=11
√36=6
√49=7
√121=11
√36=6
√49=7
Answered by
35
Answer:
(1)121
121-1=120
120-3=117
117-5=112
112-7=105
105-9=96
96-11=85
85-13=72
72-15=57
57-17=40
40-19=21
21-21=0
Hence 121 is a perfect square and √121=11
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