NCERT MCQs on Factor Trees – Class 6
CBSE Class 6 Mathematics – NCERT MCQs with Answers & Step-by-Step Solutions
Chapter 5: Prime Time
Topic: Factor Trees
Strictly Based on NCERT | Latest CBSE Curriculum
CBSE Board Examination Preparation – Class 6 Mathematics
1. In a factor tree of 20, which pair can be the first split?
Correct Answer: A
20 = 2 × 10. Step 1: Split 20 into 2 and 10. Step 2: 10 = 2 × 5. Final prime factors: 2 × 2 × 5.
20 = 2 × 10. Step 1: Split 20 into 2 and 10. Step 2: 10 = 2 × 5. Final prime factors: 2 × 2 × 5.
2. The prime factors at the end of a factor tree are called:
Correct Answer: C
Prime numbers appear at the ends of branches in a factor tree. These are called leaves.
Prime numbers appear at the ends of branches in a factor tree. These are called leaves.
3. Factor tree of 18 gives prime factors:
Correct Answer: C
18 → 2 × 9 → 3 × 3 So, 18 = 2 × 3 × 3.
18 → 2 × 9 → 3 × 3 So, 18 = 2 × 3 × 3.
4. A factor tree always ends when:
Correct Answer: B
We stop splitting when all numbers at the ends are prime.
We stop splitting when all numbers at the ends are prime.
5. Factor tree of 24 gives:
Correct Answer: A
24→2×12→2×6→2×3.
24→2×12→2×6→2×3.
6. Factor tree of 30 ends with:
Correct Answer: A.
7. Factor tree of 36 gives:
Correct Answer: A.
8. Which number cannot be split further in a factor tree?
Correct Answer: C
17 is prime.
17 is prime.
9. Factor tree of 45 ends with:
Correct Answer: A.
10. Factor tree method is used to find:
Correct Answer: B.
11. Factor tree of 50 gives:
Correct Answer: A.
12. Factor tree of 72 ends with:
Correct Answer: A.
13. Factor tree of 81 gives:
Correct Answer: A.
14. If a factor tree of 56 ends with 2,2,2,7 then:
Correct Answer: D
All represent factorization.
All represent factorization.
15. Factor tree of 64 gives:
Correct Answer: A.
16. Factor tree of 90 ends with:
Correct Answer: A.
17. Factor tree is another method of:
Correct Answer: B.
18. Factor tree of 125 gives:
Correct Answer: D.
19. Which number has only one possible factor tree split?
Correct Answer: C
17 is prime.
17 is prime.
20. In a factor tree, multiplication of all prime leaves equals:
Correct Answer: C
The product of prime factors equals the original number.
The product of prime factors equals the original number.