Explain why 7× 11 × 13 + 13 and 7 × 6 × 5 × 4 ×3 × 2 × 1 + 5 are composite number
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Step-by-step explanation:
In 7*11*13+13 :
13(7*11*1+1)
13(77+1)
13(78)
=1014 (it is a composite number because it is divisible by 2,13 and also by itself)
In 7*6*5*4*3*2*1+5:
5(7*6*1*4*3*2*1+1)
5(1008+1)
5(1009)
= 5045(it is a composite number because it is divisible by 5, and itself)
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Answer:
because they both have two factors rather than 1
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