What day of the week was 31st January 2007?
AWednesday
BThursday
CTuesday
DMonday
Answer:
A. Wednesday
Read Explanation:
Solution:
No. of Odd days | Simple year | Leap year |
365 ÷ 7 = 52 weeks + 1 odd day | 366 ÷ 7 = 52 weeks + 2 odd day |
Years | No. of odd days |
100 years | 5 |
200 years | 3 |
300 years | 1 |
400 years | 0 |
Note: Multiple of 400 years i.e. 800, 1200, 1600, 2000 have 0 odd days.
Calculating leap year: For Finding number of leap year (1-99)yr, divide the number of years by 4 and the quotient will be the number of leap year.
Code for week days
No. of odd days | Day |
0 | Sunday |
1 | Monday |
2 | Tuesday |
3 | Wednesday |
4 | Thursday |
5 | Friday |
6 | Saturday |
Total odd days = 0 + 2 + 5 + 3 = 10 days = 1 week + 3 odd days
3 is the code for "Wednesday"
Hence, “Wednesday” is the correct answer.