When a certain number 'x' is multiplied bt 18, the product 'y' has all digits as 4s. what is the minimum number of digits 'x' can have?  Choose the correct choice
A) 8	B) 9	C) 12	D) 14	E) 18
18=9*2   444......4/9*2 = 22222....2/9   to be completely divisible sum of all 2's should be a multiple of 9(divisibility test for 9)   so it should have 9 digit (2+2+2+2+2+2+2+2+2=18)   ANSWER:9
<result>B</result>
When a certain number 'x' is multiplied bt 18, the product 'y' has all digits as 4s. what is the minimum number of digits 'x' can have?