Question

Find the cubes of the following number by column method  56 .

Answer 1

We have to find the cube of 56 using column method. We have: \[a = 5 \text{ and b = 6\]

Column I a3	Column II   \[3 \times a^2 \times b\]	Column III   \[3 \times a^2 \times b\]	Column IV b3
\[5^3 = 125\]	\[5^3 = 125\]	\[3 \times a \times b^2 = 3 \times 5 \times 6^2 = 540\]	\[6^3 = 216\]
+50	+56	+ 21	216
175	506	561
175	6	1	6

 

 

 

Thus, cube of 56 is 175616.