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Number Theory : Math MCQ Practice Questions & Answers (Bengali) - ObjectiveMcq

Math Practice

Topics

Algebra
- Linear Equations
- Quadratic Equations
Arithmetic
Geometry
- Mensuration
- Triangle
Number Theory

PracticeMathNumber Theory

Number Theory in Math : Practice MCQ Questions & Answers with Explanations

2 practice sets · Page 1 of 1

MathMediumNumber TheoryPrimes

1.

Which of the following numbers are perfect squares?

A

16

B

20

C

49

D

50

Correct Answers:

(A) 16; (C) 49

Explanation:

16 = 4² and 49 = 7² are perfect squares. 20 and 50 are not.

MathEasyNumber TheoryLcm And Hcf

2.

What is the LCM of 12 and 18?

A

36

B

6

C

72

D

24

Correct Answer:

(A) 36

Explanation:

Prime factors: 12 = 2² × 3, 18 = 2 × 3². LCM = 2² × 3² = 36.