Prime Factorization Quiz (Class 6)

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Prime factorization practice

NEHA JAISWAL

India

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Prime Factorization Quiz (Class 6)


Prime Factorization Quiz (Class 6)Version en ligne Prime factorization practice par NEHA JAISWAL 1 Prime factorization of 60 is: a 3×4×5 b 2×2×3×5 c 2×2×2×5 d 2×3×5 2 Prime factorization of 84 is: a 2×2×3×3×? (invalid) b 2×3×7 c 2×2×2×3 d 2×2×3×7 3 Is 1 a prime number? a Only divisible by itself b Yes c No d Depends on definition 4 Which number is prime? a 11 b 15 c 21 d 25 5 Prime factorization of 48 is: a 2×2×2×2×3 b 2×2×2×3 c 3×16 d 2×3×4×2 6 Smallest prime factor of 91 is: a 2 b 11 c 7 d 13 7 A composite number has at least one prime factor. a False b Cannot be determined c Depends on number d True 8 Prime factorization of 100 is: a 5×5×5 b 2×2×5×5 c 2×2×2×5 d 2×5×5 9 Is 29 prime? a Only divisible by 3 b No c Yes d Only divisible by itself 10 How many times does 2 appear in 72's prime factorization? a 2^3 b 2^4 c 2^2 d 2^1 Feedback 1 60 = 2²·3·5; primes only appear as factors. 2 84 = 2²·3·7; all primes. 3 By definition, primes have exactly two distinct positive divisors. 4 11 has no divisors other than 1 and 11. 5 48 = 2⁴·3; factors are all primes. 6 91 = 7×13; 7 is the smallest prime factor. 7 Every composite number factors into primes. 8 100 = 2²·5²; primes only. 9 29 has no divisors other than 1 and 29. 10 72 = 2³×3²; two occurs three times.