Question

if 15 x 2is a multiplay of 4, where 'x' is a digit. what are the possible value of 'x'?​

Answer 1

Step-by-step explanation:

The alternating sum of the of digits of a number divisible by 11 are in multiples of 11

i.e, sum of the even places subtracted from sum of odd places will be in multiples of 11

For 3x2, sum of the even places =x,

Sum of the odd places =3+2=5

So, 5−x=11n,

At n=0⇒5−x=0,

∴x=5