Square root and cube root

user November 19, 2023

(31) What is the square root of 625?

(a) 25
(b) 30
(c) 35
(d) 40

Correct Answer: (a) 25
The square root of 625 is $ \sqrt{625} = 25 $.
$\sqrt{625} = 25$

(32) If the cube root of a number is 4, what is the cube of that number?

(a) 4
(b) 64
(c) 256
(d) 1024

Correct Answer: (b) 64
If the cube root of a number is 4, then the number itself is $4^3 = 64$. The cube of this number is $64^3$.
$64^3 = 262,144$

(33) What is the smallest integer that when squared gives a number greater than 10,000?

(a) 100
(b) 99
(c) 101
(d) 98

Correct Answer: (c) 101
The smallest integer whose square is greater than 10,000 is 101 since $100^2 = 10,000$ and $101^2 = 10,201$.
$101^2 = 10,201 > 10,000$

(34) What is the cube root of 729?

(a) 9
(b) 27
(c) 81
(d) 243

Correct Answer: (a) 9
The cube root of 729 is $ \sqrt[3]{729} = 9 $.
$\sqrt[3]{729} = 9$

(35) If the square of a number is 100, what is the cube root of that number?

(a) 1
(b) 2
(c) 10
(d) 1000

Correct Answer: (c) 10
If the square of a number is 100, then the number itself is $ \sqrt{100} = 10 $. The cube root of this number is $ \sqrt[3]{10} $.
$\sqrt[3]{10} = 1000$

Post Views: 1