What day was it? — Mathematical Reasoning Aptitude Question
What day was it?: If 15 August 2026 is a Saturday, what day is 15 September 2026? Answer and worked solution on CodeKairo.
- Topic: Mathematical Reasoning
- Section: Logical Reasoning
- Difficulty: Medium
- Time target: 60 seconds
Question
If 15 August 2026 is a Saturday, what day is 15 September 2026?
Options
- Thursday
- Monday
- Tuesday
- Wednesday
Show the answer and the worked solution
Correct answer: C. Tuesday
Worked solution
- From 15 August to 15 September is 31 days.
- 31 = 4 weeks + 3 days, so move 3 days on from Saturday: Sunday, Monday, Tuesday.
Answer: Tuesday.
The idea
Count 'odd days' — the remainder after dividing by 7 — and advance the weekday by that many. Month lengths matter: 31 days gives 3 odd days, 30 gives 2, February 28 gives 0.
Shortcut. Four weeks after Saturday 15 August is Saturday 12 September; three days more is Tuesday the 15th.
Common trap. "Monday" — counting August as 30 days (2 odd days); August has 31, which is 3 odd days.