9. The least number which should be added to 28523 so that the sum is exactly divisible by 3, 5, 7 and 8 is	Options.
A) 41 B) 42 C) 32 D) 37 E) 39

Rationale: lcm of 3 , 5 , 7 and 8 = 840 28523 ÷ 840 = 33 remainder = 803 hence the least number which should be added = 840 - 803 = 37 answer : option d
Answer: D