Well, to first start out, knowing you have a 5, the number had to end in a 5 or 0.
If you multiply these numbers to gather, you will get your answer, or you can find a lower number. But since only one number is even, 8*7*5 will be your best answer.
Answer=280
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5/7 x 7/8 is 5/8
Their LCM is 280
840
As we know that the formula of n!=n(n-1)! so 8!=8*(8-1)! =8*7! =8*7*6! =8*7*6*5! =8*7*6*5*4! =8*7*6*5*4*3! =8*7*6*5*4*3*2! =8*7*6*5*4*3*2*1! =8*7*6*5*4*3*2*1 =40320 so the factorial of the given no. 8 is 40320.
You don't know!!!! Compare 5/7 & 7/8 ; which greater? To compare , we bring to a common denominator of 56 ( 7 x 8 ) in this case. We then make the numerators the equivalent fraction. Hence 5/7 = 5(8)/7(8) & 7/8 = 7(7)/8(7) 5/7 = 40/56 & 7/8 = 49/56 We now compare numerators, because the denominators are the same value at '56'. (top number) 40 < 49 Hence 40/56 < 49/56 It follows that 5/7 < 7/8