Intelligent Math Puzzle – Challenge 91
Looking for great math puzzles to get students strategically thinking about math? If so, then this math challenge is just for you!

Challenge:
Mrs. Walters has 61 candles. She burns one candle every day and always makes one new one from the remaining wax of seven burnt candles. After how many days she needs to buy new candles?
A- 62
B- 68
C- 69
D- 70
E- 71
The Absolute Best Book to Challenge Your Smart Student!

The correct answer is E.
Mrs. Walters burns one candle every day and she can make a new one from the remaining wax of seven burnt candles. After 56 days, Mrs. Walters can make 8 new candles. (56 ÷ 7 = 8)
So, she has 13 candles now. After seven days, she burns 7 candles and makes another candle. So, she has 7 candles now. She can burn these 7 candles in 7 days and make a new candle after that for another day.
Therefore, she needs to buy new candles after 71 days:
56 + 7 + 7 + 1 = 71
The Best Books to Ace Algebra
Related to This Article
More math articles
- FREE 7th Grade MCAS Math Practice Test
- How to Use Arrays to Divide Two-Digit Numbers by One-digit Numbers
- 4 Perfect Tablets for Note-Taking in 2026
- 6th Grade IAR Math Practice Test Questions
- ACT Math: Test-Taking Strategies
- 10 Most Common 3rd Grade Common Core Math Questions
- 4th Grade NJSLA Math Worksheets: FREE & Printable
- 4th Grade IAR Math FREE Sample Practice Questions
- Top 10 3rd Grade OST Math Practice Questions
- How to Solve Simple Interest Problems? (+FREE Worksheet!)
What people say about "Intelligent Math Puzzle – Challenge 91 - Effortless Math: We Help Students Learn to LOVE Mathematics"?
No one replied yet.