Question

If 421 x is a multiple of 6 and x is a digit then x = what?

Answer 1

Answer:

x=2 or 8

Step-by-step explanation:

given number is divisible by 6 iff the number is divisible both by 2 and 3

421x is divisible by 2

implies x has to be even

i.e. x = 0,2,4,6 or 8

now 421x has to be divisible by 3

implies 4+2+1+x = 7+x has to be divisible by 3

checking for all values of x we get that only 2 and 8 satisfy the given conditions and hence are the answers