10th CBSE Maths QUIZ – Real Numbers 100 MCQS

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10th CBSE Mathematics

Real Numbers – 10 Theory MCQ Tests | 100 Questions

Test 1 – Real Numbers Theory

10 Questions | 10 Marks

1. Which statement correctly describes a prime number?

A. A number having exactly one factor B. A number having exactly two positive factors C. A number having more than two factors D. Every even number

Correct Answer: B. A number having exactly two positive factors.

2. What is the meaning of HCF of two positive integers?

A. Their smallest common factor B. Their greatest common factor C. Their greatest common multiple D. Their sum

Correct Answer: B. Their greatest common factor.

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3. Which algorithm is commonly used to find the HCF of two positive integers?

A. Euclid's division algorithm B. Newton's law C. Pythagoras theorem D. Binomial theorem

Correct Answer: A. Euclid's division algorithm.

4. In Euclid's division lemma, what condition must the remainder satisfy?

A. Remainder must be greater than divisor B. Remainder must equal divisor C. Remainder must be less than divisor D. Remainder must always be 1

Correct Answer: C. Remainder must be less than divisor.

5. Which statement about two consecutive positive integers is correct?

A. Their HCF is always 1 B. Their HCF is always 2 C. Their HCF is always 3 D. Their HCF is always their product

Correct Answer: A. Their HCF is always 1.

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6. Which type of number is neither prime nor composite?

A. 0 B. 1 C. 2 D. 3

Correct Answer: B. 1.

7. What is the main idea of prime factorisation?

A. Expressing a number as a product of primes B. Expressing a number only as a sum C. Finding only odd factors D. Finding decimal places

Correct Answer: A. Expressing a number as a product of primes.

8. Which statement correctly describes rational numbers?

A. They cannot be written as a fraction B. They can be expressed as p/q where p and q are integers and q ≠ 0 C. They are always irrational D. They are always non-terminating

Correct Answer: B. They can be expressed as p/q where p and q are integers and q ≠ 0.

9. Which decimal expansion represents an irrational number?

A. Terminating decimal B. Non-terminating repeating decimal C. Non-terminating non-repeating decimal D. Integer decimal

Correct Answer: C. Non-terminating non-repeating decimal.

10. The LCM of two co-prime positive integers is equal to:

A. Their sum B. Their difference C. Their product D. 1

Correct Answer: C. Their product.

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