explain why 7×13×11+13 and (7×6×5×4×2×3×2×1)+3 are composite numbers
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Becouse after adding 3 and 13 they are only divisible by 1 and itself a reason behind that can be prime +composite number is always composite while 3 and 13 are composite
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composite numbers are those whole numbers that can be divided evenly by numbers other than 1 and itself .
so 7×13×11+13 can be written as 13(7×11+1) {taking 13 as common from both the terms} ⇒13×78 now 13×78 is a composite number as it is divided by 13 and 78 which are not 1 and the number itself. similarly (7×6×5×4×3×2×1+13) is a composite number
so 7×13×11+13 can be written as 13(7×11+1) {taking 13 as common from both the terms} ⇒13×78 now 13×78 is a composite number as it is divided by 13 and 78 which are not 1 and the number itself. similarly (7×6×5×4×3×2×1+13) is a composite number
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