LCM and HCF

1

Which is the least number that must be subtracted from 1856, so that the remainder when divided by 7, 12, and 16 is 4.

  1. 137
  2. 140
  3. 172
  4. 1361
2

What is the greatest number which exactly divides 110, 154 and 242?

3

What is the highest 3 digit number which is exactly divisible by 3, 5, 6 and 7?