Square Roots & Cube Roots

1

By what least number  4320 be multiplied to obtain a number which is a  perfect cube ?

A. 50
B. 40
C. 45
D. 48

2

If `x = ((sqrt(5) + sqrt(3))/(sqrt(5) - sqrt(3)))` and `y = ((sqrt(5) - sqrt(3))/(sqrt(5) + sqrt(3)))` find he value of

`(x^2 + y^2)`.

A. 60
B. 61
C. 62
D. 63

3

If `sqrt(2)` = 1.4142, find the value of `(sqrt(2))/((2 + sqrt(2)))`

A. 0.3423
B. 0.4142
C. 0.3233
D. 0.4241

4

Find the least square number which is exactly divisible by 10. 12, 15, and 18.

A. 900
B. 850
C. 880
D. 840

5

If `sqrt(15) = 3.88, ` find the value of `sqrt(5/3)`

A. `1.12overline(7)`
B. `1.18overline(2)`
C. `1.23overline(5)`
D. `1.29overline(3)`