SOLUTION: use the digits 2, 3, 5 and 7 so the product is 945. need to show work

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Question 704890: use the digits 2, 3, 5 and 7 so the product is 945. need to show work
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
No. You cannot use 2. If 2 is a factor, the product WILL be even. Any integer ending in 5 is odd. Try completely factoring 945 and you will see. You first find 5*9*21, and then..., 5*3*3*3*7. There is no "2" and there is no "7".