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universoulllmocha
the greatest common factor is 2.

The factors of 90 are: 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90. The factors of 138 are: 1, 2, 3, 6, 23, 46, 69, 138. The factors of 154 are: 1, 2, 7, 11, 14, 22, 77, 154.

I hope that this helps you !

Answer:

2

Step-by-step explanation:

FIRST FIND THE PRIME FACTORS:-

154 = 2 * 7 * 11

138 = 2 * 3 * 23

90 = 2 *3 * 3 * 5

The only number common to all three numbers  is 2.

GCF = 2

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