Grade 8 Mathematics Quiz: Square and Cube (Set 3) | Concept of Maths

Question 1

A gardener wants to plant 1225 saplings in a square formation such that the number of rows is equal to the number of columns. How many saplings should be in each row?

Accepted Answer

C) 35

Answer

A) 25

Answer

B) 30

Answer

D) 45

Question 2

Which of the following sets of numbers does NOT represent a Pythagorean triplet?

Accepted Answer

D) $(7, 24, 26)$

Answer

A) $(3, 4, 5)$

Answer

B) $(5, 12, 13)$

Answer

C) $(8, 15, 17)$

Question 3

Find the smallest number by which 540 must be multiplied to make it a perfect square.

Accepted Answer

B) 15

Answer

A) 5

Answer

C) 3

Answer

D) 10

Question 4

What is the value of $\sqrt[3]{0.000216}$?

Accepted Answer

A) 0.06

Answer

B) 0.6

Answer

C) 0.006

Answer

D) 0.016

Question 5

How many non-perfect square natural numbers lie between $15^2$ and $16^2$?

Accepted Answer

C) 30

Answer

A) 15

Answer

B) 16

Answer

D) 31

Question 6

The volume of a cubical box is $1331cm^3$. What is the length of one side of the box?

Accepted Answer

B) 11 cm

Answer

A) 121 cm

Answer

C) 21 cm

Answer

D) 13 cm

Question 7

Without adding, find the sum of the first 12 odd natural numbers ($1+3+5+...+23$).

Accepted Answer

C) 144

Answer

A) 121

Answer

B) 132

Answer

D) 156

Question 8

By which smallest number should 1024 be divided so that the quotient is a perfect cube?

Accepted Answer

A) 2

Answer

B) 4

Answer

C) 8

Answer

D) 16

Question 9

What is the unit digit of the cube root of the number 42875?

Accepted Answer

D) 5

Answer

A) 2

Answer

B) 3

Answer

C) 4

Question 10

Find a Pythagorean triplet whose smallest member is 6.

Accepted Answer

B) $(6, 8, 10)$

Answer

A) $(6, 7, 8)$

Answer

C) $(6, 9, 11)$

Answer

D) $(6, 12, 14)$