Tough and Tricky questions: Combinations.
The product of the digits of the four-digit number h is 54. No two digits of h are identical. How many different numbers are possible values of h? Choose the correct choice.
A) 24	B) 28	C) 30	D) 36	E) 48
24nswer = 24 = 24   Let number =abcd   Given that a*b*c*d = 54   a,b,c,d can be 1,2,3,9   Number of ways = 4*3*2= 
<gadget id="calculator">4*3*2</gadget>
<output>24</output>
24
<result>A</result>
Tough and Tricky questions: Combinations.
The product of the digits of the four-digit number h is 54. No two digits of h are identical. How many different numbers are possible values of h?