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The product of all digits of a 4 digit number is 630. How many such numbers can be made.

+2 votes
221 views

All the digits of the given number are different.

posted Dec 10, 2014 by anonymous

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3 Solutions

+2 votes
 
Best answer

Ans: 48
1) Four digit number can be formed by using 3, 5, 6,7
Total numbers= 4! = 24

2)Four digit number can be formed by using 2, 5, 7,9
Total numbers= 4! = 24

So total four digit numbers = 24+24 = 48

solution Dec 12, 2014 by Swapnil Morankar
+1 vote

Answer: 48

possible 4 digit number: 5 2 7 9 => 4! = 24
6 5 7 3 => 4! = 24

solution Dec 22, 2014 by Shashi Kant
–1 vote

It should be 24.
9752
9725
9275
9257
9572
9527
.
.
.

!4
24

solution Dec 11, 2014 by Double S
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