Qube of 25 by column method
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1) Find 243.
Solution: Here two digits are 2 and 4.
a = 2, and b = 4. By using the column-method:-
Column I
Column II
Column III
Column IV
a3
3 x a2 x b
3 x a x b2
b3
23 = 8
+ 5
3 x 22 x 4 = 48
+ 10
3 x 2 x 42 = 96
+ 6
43 = 64
13
58
102
4
13
8
2
4
∴ 243 = 13824
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