Number Properties Puzzle – Challenge 17
A FREE math puzzle for all ages! Sharing this fun math challenge with your kids is a good way to get them thinking mathematically.
![Number Properties Puzzle – Challenge 17](https://www.effortlessmath.com/wp-content/uploads/2020/04/17-512x240.jpg)
Challenge:
How many numbers between 400 and 600 begin with digit 5 or end with digit 5?
A- 20
B- 100
C- 110
D- 120
E- 140
The Absolute Best Book to Challenge Your Smart Student!
![](https://www.effortlessmath.com/wp-content/uploads/2020/04/answer.png)
The correct answer is C.
Numbers between 500 and 599 begin with 5. So, there are 100 numbers that begin with 5.
Consider numbers that end with 5:
405, 415, 425, 435, …, 495
Also, numbers 505, 515, 525, …, 595, end with 5. But, we counted them before!
There are 20 numbers that end with 5. We counted 10 of them before. Therefore, there are 100 + 10 = 110 numbers that begin with digit 5 or end with digit 5.The Absolute Best Books to Ace Algebra
Original price was: $29.99.$19.99Current price is: $19.99.Original price was: $29.99.$14.99Current price is: $14.99.Original price was: $29.99.$14.99Current price is: $14.99.Satisfied 1 StudentsOriginal price was: $24.99.$14.99Current price is: $14.99.Satisfied 92 StudentsOriginal price was: $24.99.$15.99Current price is: $15.99.Satisfied 125 Students
Related to This Article
More math articles
- Classifying a Conic Section (in Standard Form)
- Algebra Puzzle – Challenge 35
- Grade 10 Math Worksheets: FREE & Printable
- How to Find the Center and the Radius of Circles? (+FREE Worksheet!)
- Is the ACCUPLACER Test hard?
- How to Solve Word Problems of Calculating Profit
- Top 10 Tips to Create an ACT Math Study Plan
- CLEP College Algebra FREE Sample Practice Questions
- Full-Length 7th Grade Common Core Math Practice Test-Answers and Explanations
- 10 Most Common 3rd Grade Georgia Milestones Assessment System Math Questions
What people say about "Number Properties Puzzle – Challenge 17 - Effortless Math: We Help Students Learn to LOVE Mathematics"?
No one replied yet.