15th October 1984 will fall on which of the following days?
AMonday
BTuesday
CThursday
DWednesday
Answer:
A. Monday
Read Explanation:
1600 yeaes contain 0 odd days
300 years contain 1 odd day
83 years contain 20 leap year and 63 normal years
so in 83 years there are 40 odd days = 5 odd days
1984 contains 1 + 5 = 6 odd days
from 1 january 1984 to 15 october 1984 there are 289 days
in 289 days there are 2 odd days
so in total there are 6 + 2 = 8 odd days = 1 odd day
0 odd day = sunday
1 odd day = monday
2 odd days = tuesday
3 odd days = wednesday
4 odd days = thursday
5 odd days = friday
6 odd days = saturday
there for 15 october 1984 was Monday
