The numbers 30 and 126, written as products of their prime factors, are 30 = 2 × 3 × 5 and 126 = 2× 3 ×3 ×7. find the largest integer which is a factor of 30 and 126.

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answer:  

step-by-step explanation:

odd numbers are only divisible by 1 and itself.

even numbers are divisible by more than 1 and itself.

for example 6 is even because it is divisible by more than 1 and its self. 1 x 6= 6 ; 2 x 3= 6

and 7 is odd because only 7 x 1 equals seveb