Number Properties Puzzle – Challenge 1
This is a great math challenge for those who love mathematics and critical thinking challenges. Let's challenge your brain!
Challenge:
What is the average (arithmetic mean) of all the multiples of ten from 110 to 990 inclusive?
A- 480
B- 500
C- 550
D- 590
The Absolute Best Book to Challenge Your Smart Student!
The correct answer is C.
To answer this question, you can add all the multiples of ten from 110 to 990 and then divide the answer by the number of numbers. As you can imagine, this method takes a lot of time. Another way to solve this problem is by finding the average of the first number 110 and last number 990 (110 + 990 = 1100 ÷ 2 = 550). Do the same thing for the next two numbers 120 and 980. Continue the process for other pair of numbers; 130-970, 140-960, etc. The average of all pairs is 550. Therefore, the average (arithmetic mean) of all the multiples of ten from 110 to 990 inclusive is 550.
The Absolute Best Books to Challenge Students!
Related to This Article
More math articles
- How to Order Fractions: Step-by-Step Guide
- How to Write an Equation from a Graph?
- How to Divide Polynomials Using Long Division?
- Proportional Predictions: How to Use Proportions to Estimate Population Size
- PSAT / NMSQT Math-Test Day Tips
- Best Ergonomic Chairs for Online Teachers in 2024
- How to Demystifying the Bell Curve: A Comprehensive Guide to Understanding Normal Distribution
- How to Identify the Change, Price, or Amount Paid
- 4th Grade LEAP Math Worksheets: FREE & Printable
- Areas Formed by Function Contours
What people say about "Number Properties Puzzle – Challenge 1 - Effortless Math: We Help Students Learn to LOVE Mathematics"?
No one replied yet.