Find the missing number, if same rule is followed in all the figures.
A10
B28
C71
D140
please explain
Ans 2:
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Ans 4:
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Ans 9:
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Ans 10:
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Class : Class 8
Calculate squares of all numbers and then add them up. 7x7=49 2x2=4 1x1=1 49 4 1=54.