Question

Find the greatest number that will divide 153 ,204 and 357 without leaving any remainder.

Answer 1

51.

Explanation:

Finding the prime factors:

153 = 3 * 3 * 17

204 = 2 * 2 * 3 * 17

357 = 3 * 7 * 17

3 * 17 is common to all three sets of factors.

So the greatest common factor (GCF) = 3*17 = 51.