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y 7 \times 11 \times 13 + 13 \text { and } 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1 + 5 |
Answer» <p>7×11×13 + 13so13 (77+ 1)so there are two factors so they are composite</p><p>5 ( 7×6×4×3×2 +1)so they are two factors so it is a composite number</p> | |