Prime factorisation
6th grade (Year 7 in England) · 16 questions · Common Core: 6.NS.B.4 · England: KS3 Number, GCSE Foundation Number, 11+ Number
Name
Date
Score/ 16
Question 1
18 is written as a product of primes. What is the largest prime factor?
Answer
Question 2
Which is 225 written as a product of prime factors?
- A. 2 × 3² × 5²
- B. 3² × 5²
- C. 3 × 5²
- D. 3³ × 5
Question 3
78 is written as a product of primes. What is the largest prime factor?
Answer
Question 4
Which is 200 written as a product of prime factors?
- A. 2⁴ × 5²
- B. 2³ × 5²
- C. 2³ × 3 × 5
- D. 2² × 5²
Question 5
44 is written as a product of primes. What is the largest prime factor?
Answer
Question 6
Which is 168 written as a product of prime factors?
- A. 2² × 3 × 7
- B. 2⁴ × 3 × 7
- C. 2³ × 3 × 7
- D. 2³ × 3²
Question 7
20 is written as a product of primes. What is the largest prime factor?
Answer
Question 8
Which is 84 written as a product of prime factors?
- A. 2 × 3 × 7
- B. 2² × 3 × 7
- C. 2² × 3²
- D. 2³ × 3 × 7
Question 9
98 is written as a product of primes. What is the largest prime factor?
Answer
Question 10
Which is 200 written as a product of prime factors?
- A. 2³ × 3 × 5
- B. 2⁴ × 5²
- C. 2³ × 5²
- D. 2² × 5²
Question 11
18 is written as a product of primes. What is the largest prime factor?
Answer
Question 12
Which is 120 written as a product of prime factors?
- A. 2³ × 3²
- B. 2² × 3 × 5
- C. 2⁴ × 3 × 5
- D. 2³ × 3 × 5
Question 13
110 is written as a product of primes. What is the largest prime factor?
Answer
Question 14
Which is 84 written as a product of prime factors?
- A. 2³ × 3 × 7
- B. 2² × 3²
- C. 2 × 3 × 7
- D. 2² × 3 × 7
Question 15
12 is written as a product of primes. What is the largest prime factor?
Answer
Question 16
Which is 180 written as a product of prime factors?
- A. 2³ × 3² × 5
- B. 2² × 3³
- C. 2 × 3² × 5
- D. 2² × 3² × 5
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