Intelligent Math Puzzle – Challenge 91
Intelligent Math Puzzle - Challenge 91 is a multiple-choice math challenge from Effortless Math. Read the problem, choose from the answer options below, then open the solution to see the full step-by-step working and check your reasoning against it.
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
- How to Identify Linear vs. Nonlinear Functions? (+FREE Worksheet!)
- The Second Industrial Revolution and the National Market
- How to Prepare for the PSAT 8/9 Math Test?
- 10 Most Common DAT Quantitative Reasoning Math Questions
- A Comprehensive Collection of Free Praxis Math Practice Tests
- Why Inequality Persists
- Math Skills You Need for the GED Math Test
- Georgia Milestones Grade 6 Math Free Worksheets: Free Printable PDFs Covering Every Grade 6 Standard
- How Does SAT Essay Affect Writing Score?
- The Best Grade 8 ELA Practice Tests for New Jersey Students
What people say about "Intelligent Math Puzzle: Challenge 91"?
No one replied yet.