Day-of-the-week puzzles — Maths trick for kids

The trick

Leftover days — “divide by 7 and count only the leftover days”

1. Divide the number of days by 7 and keep the remainder.
2. Count that many days forward from today (backward for “days ago”).
3. Two dates in the same month: the days between them = later date − earlier date.

Use it for: Planning holidays and birthdays, calendar questions in reasoning tests, and Olympiad puzzles.

Worked example: If today is Tuesday, what day will it be after 30 days? Thursday

✏️ Practice

Work it out in your head or on paper, then tap your answer — or type it and press Check. Stuck? Press “Show me how”.

🏁 Trick 13 test

20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.

🏅 Sign in with Google to earn the 📅 Calendar Captain badge when you pass — and a certificate when you finish all 5 tricks of Part 3 · Puzzles & quick wins. You can still take the test without signing in.

🖨️ Day of the Week Puzzles Worksheet

• Worksheet set 1 (PDF)
• Worksheet set 2 (PDF)
• Worksheet set 3 (PDF)