Multiple choice

Find the greatest number that will divide 390, 495 and 300 without leaving a remainder.

  1. 5

  2. 15

  3. 25

  4. 35
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

To find the greatest number dividing 390, 495, and 300 without remainder, we need the HCF. Factorizing: 390 = 2 × 3 × 5 × 13, 495 = 3 × 3 × 5 × 11, 300 = 2 × 2 × 3 × 5 × 5. The common factors are 3 and 5, so HCF = 3 × 5 = 15. 5 is too small (common but not greatest). 25 and 35 are not factors of all three numbers.

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