explain why 7×11×13+13 and 7×6×5×4×3×2×1+5 are composite numbers
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7×11×13+13
13{7×11×1+1}
13{78}
so we see that it have already a two factor. so it is composite number
7×6×5×4×3×2×1+5
5{7×6×1×4×3×2×1+1}
5{1009}
hence it have also atleast two factor hence it is composite number
note:- a no. which have two or more than two factor are called composite no.
13{7×11×1+1}
13{78}
so we see that it have already a two factor. so it is composite number
7×6×5×4×3×2×1+5
5{7×6×1×4×3×2×1+1}
5{1009}
hence it have also atleast two factor hence it is composite number
note:- a no. which have two or more than two factor are called composite no.
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