Question

calculation of cube of a 2 digit number ending with 1​

Answer 1

Answer:

Step-by-step explanation:

31*31*31 =29791

Answer 2

Answer:

11, 21, 31, 41, 51, 61, 71, 81, 91

Step-by-step explanation:

All numbers with 1 in the unit digit place will give a cube ending with 1​.

Example: 11, 21, 31, 41, 51, 61, 71, 81, 91

ALSO

Write the number in the form of (10x+y)

∴(10x+y)³=(10x)³+y³+3(10xy)(10x+y)

=1000x³+y³+30xy(10x+y)