Download App

Cube and Cube Roots — MATHS STD 8 — Question

Gujarat BoardEnglish MediumSTD 8MATHSCube and Cube Roots1 Mark
MCQ
Find the cube root of the following number by prime factorisation method: $64$
  • A
    $2$
  • ✓
    $4$
  • C
    $8$
  • D
    $10$
✓

Answer

Correct option: B.
$4$
Prime factorising, we get,
$64 = 2 \times 2 \times 2 \times 2 \times 2 \times 2$
$= 4 \times 4 \times 4​.$
Here, the factor $4$ occur as triplet. Hence, it is a perfect cube.
Therefore, cube root of $64$, i.e. $\sqrt[3]{64}=4$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q. [1 Marks Each]" from Cube and Cube Roots→Cube and Cube Roots — all question types→MATHS STD 8 question papers→Gujarat Board STD 8 question papers→Gujarat Board question paper generator→

Similar questions

$12$ men can dig $8$ meters long trench in a day. How many men should be employed for digging $50$ meter long trench of the same type in one day?
→
Mark $(\checkmark)$ against the correct answer: $7x^2 - 19x - 6 = \ ?$
→
Which of the following cannot be a perfect square?
→
The usual form of $2.08 \times 10^{-5}$ is
→
Tick $(\checkmark)$ the correct answer in the following: A sum of $Rs. 25000$ was given as loan on compound interest for $3$ years compounded annually at $5%$ per annum during the first year, $6%$ per annum during the second year and $8%$ per annum during the third year. The compound interest is.
→
The one’s digit of the cube of the number $144$ is:
→
The Ratio of $10\ m$ to $1\ Km$ is Equal To:
→
The volume of a room is $80 \mathrm{m}^{3}$. The area of the floor is $20 \mathrm{m}^{2}$. The height of the room is
→
The sum of two numbers is $\frac{-4}{3}$. If one of the numbers is -5 , what is the other?
→
In which of the following quadrants does the point A(2, - 3) lie?
→