Multiple choice

Which of the following prime numbers groups appears in the prime factorisation of 2345?

  1. 3, 5, 53

  2. 3, 5, 31

  3. 5, 7, 67

  4. 3, 5, 13
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The prime factorisation of 2345 = 5 $\times$ 7 $\times$ 67

 
5 2345
7 469
67 67
  1
   

So, the prime numbers which appear in the prime factorisation of 2345 are 5, 7 and 67.

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