Question 10 - Figure it out - Page 114, 115 - Chapter 5 Class 6 - Prime Time (Ganita Prakash)

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Question 10 Which of the following numbers is the product of exactly three distinct prime numbers: 45, 60, 91, 105, 330?Let's find the prime factorization of each number: 45 = 3 × 3 × 5 (not three distinct primes) 60 = 2 × 2 × 3 × 5 (four factors, not distinct) 91 = 7 × 13 (two primes) 105 = 3 × 5 × 7 (three distinct primes) 330 = 2 × 3 × 5 × 11 (four distinct primes) Thus, the correct number is 105.