Square and Cube Roots Quiz Set 012

It is not possible for the square of any number to end in 2, 3, 7 or 8. Hence the answer is 0.

Let the number be n. So ${1/5} × √n$ = 0.6, which gives $√n$ = 5 × 0.6 = 3. so n = $3^2$ = 9.

We can see that √(38880) × √(9720) is same as √(2 × 2 × 2 × 2 × 2 × 3 × 3 × 3 × 3 × 3 × 5 ) × √(2 × 2 × 2 × 3 × 3 × 3 × 3 × 3 × 5 ) which equals √(2⁸ × 3¹⁰ × 5²), which equals (2⁴ × 3⁵ × 5¹), which gives 19440.

The given expression can be simplified to $0.0196 × x$ = $1.4^2$, which gives x = ${1.4^2}/0.0196$, which is same as $1.96/0.0196$ which gives 100.

The given expression can be simplified to ${√2^4/5}$ × ${3/√2^2}$ × ${5/√3^2}$, which is same as ${2^2/5}$ × ${3/2}$ × ${5/3}$, which cancels to 2.