Vishwanath
Friday, February 15, 2013
20. By what least number 4320 be multiplied to obtain a number which is a perfect cube?
A. 50
B. 25
C. 75
D. 100
Option : A
Clearly,4320=23 x 33x 22 x 5.
To make it a perfect cube, it must be multiplied by 2 x 52 i.e. 50.
Title : Square Roots And Cube Roots Q20
Description : 20. By what least number 4320 be multiplied to obtain a number which is a perfect cube? A. 50 B. 25 C. 75 D. ...
Rating : 5
