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Compute without a calculator: $$(72\cdot 78\cdot 85\cdot 90\cdot 98)\div (68\cdot 84\cdot 91\cdot 108).$$ (There's an easier way than multiplying out the giant products $72\cdot 78\cdot 85\cdot 90\cdot
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Mar 28, 2023
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Compute without a calculator:
$$(72\cdot 78\cdot 85\cdot 90\cdot 98)\div (68\cdot 84\cdot 91\cdot 108).$$
(There's an easier way than multiplying out the giant products $72\cdot 78\cdot 85\cdot 90\cdot 98$ and $68\cdot 84\cdot 91\cdot 108$!)
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Rajat Singhal
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Take the prime factorization of each factor in the product.
Barryrowe
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