explain why 7 into 11 into 13 into 15 - 15 is a composite number
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Step-by-step explanation:
7x11x13x15-15
=15(7x11x13x1-1)
=15(991-1)
=15x990
=15x3^2x2x5x11
We know, the prime factorisation of a composite number is a product of prime numbers.
Hence, it is a composite number.
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