Question

Qube of 25 by column method

Answer 1

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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