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Solve this ch name is real number (10th class)question- explain why 7 ×11 ×13 + 13 and 7 × 6 ×5 × 4 × 3×2×1+5 are composite numbers. |
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Answer» HEYA!! -------- ✔Composite Number : A number that has more than TWO factors is called a composite number . 4 is the smallest composite number . ---------------------------------------------------------------------------------------------------- ⭐ 7×11×13+13 TAKING 13 common , 13 ( 7 × 11 + 1 ) 13 ( 19 ) Hence the number has two factors leading 1 and the number itself . Hence it is a composite number. ---------------------------------------------------------------------------------------------------- ⭐ 7×6×5×4×3×2×1+5 Taking 5 common 5 ( 7×6×4×3×2+1 ) 5 ( 42× 24 + 1 ) 5 ( 1008+1) 5 (1009) Hence it has two factors LEAVING 1 and the number itself . Hence it is a composite number . ---------------------------------------------------------------------------------------------------- =========================☺☺================================ |
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