What is the least number that should be added to 478 so that the number obtained is exactly divisible by 5, 6 and 12?

2

For a number to be divisible by 5, 6 and 12, it must be LCM of 5, 6, 12 i.e 60

Thus, if x is the least number to be added to 478 

Then, 478 + x = 60m, where m is a natural number 

Closest multiple of 60 near 478 is 480,

thus, 2 is the least number which should be added to 478 to make it divisible to 5, 6  and 12.