UP Police Constable Exam Model Paper 3

Given:
The number is 10, 12, 15 and 20
Concept used:
The greatest number of 3 digits is 999.
Calculation:
Lcm of 10, 12, 15 and 20 is 60
The greatest number of 3 digits = 999
⇒ 999 ÷ 60
⇒ Reminder = 39
⇒ 3 digit greatest numbers = 999 - 39 = 960
∴ The greatest number of 3 digits is 960.