Cubes and Cube Roots Test

Result

Cubes and Cube Roots Test - 5

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Weekly Quiz Competition

Question 1
1 / -0

Find the unit digit in the cube of the number 3331.

A
1

B
8

C
4

D
9

Solution

(a): Unit digit will be 1 as 1(in3331) × 1 × 1 = 1
Question 2
1 / -0

The smallest number by which 2560 must be multiplied so that the product will be a perfect cube.

A
35

B
2.5

C
8

D
5

Solution

(b): 2560 ÷ 4 = 640 640 × 10 = 6400(perfect cube) ⇒2560 × 10/4 = 6400 ∴ 10/4 = 2.5
Question 3
1 / -0

Find the value of [(5² + 12²)] is given by

A
2197

B
169

C
1693

D
289

Solution

(a): (5² + 12²)^1/2 = 13 13³ = 169 × 13 = 2197.
Question 4
1 / -0

Find the least number by which 3087 must be multiplied to make it a perfect cube.

A
3

B
4

C
9

D
7

Solution

(a) 3087 = 3 × 1029 = 3 × 3 × 343 = 3 × 3 × 7³ If we multiplying by 3, We have 3³ × 7³ perfect cube. Ans = 3.
Question 5
1 / -0

Which one of the following is a perfect cube?

A
1525

B
1728

C
1458

D
3993

Solution

(b): 12³=1728
Question 6
1 / -0

Which one of the following numbers is not a perfect cube?

A
2197

B
512

C
2916

D
343

Solution

(c): 2197 = 13³ 512 = 8³343 = 7³ But 2916 (not perfect cube).

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Re-Attempt Weekly Quiz Competition

Cubes and Cube Roots Test - 5

Result

Cubes and Cube Roots Test - 5

Score

-

Rank

-

SHARING IS CARING

Question 1

1

8

4

9

Solution

Question 2

35

2.5

8

5

Solution

Question 3

2197

169

1693

289

Solution

Question 4

3

4

9

7

Solution

Question 5

1525

1728

1458

3993

Solution

Question 6

2197

512

2916

343

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

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