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!
[include_netrun_products_block from-products="product/6-south-carolina-sc-ready-grade-3-math-practice-tests/" product-list-class="bundle-products float-left" product-item-class="float-left" product-item-image-container-class="p-0 float-left" product-item-image-container-size="col-2" product-item-image-container-custom-style="" product-item-container-size="" product-item-add-to-cart-class="btn-accent btn-purchase-ajax" product-item-button-custom-url="{url}/?ajax-add-to-cart={id}" product-item-button-custom-url-if-not-salable="{productUrl} product-item-container-class="" product-item-element-order="image,title,purchase,price" product-item-title-size="" product-item-title-wrapper-size="col-10" product-item-title-tag="h3" product-item-title-class="mt-0" product-item-title-wrapper-class="float-left pr-0" product-item-price-size="" product-item-purchase-size="" product-item-purchase-wrapper-size="" product-item-price-wrapper-class="pr-0 float-left" product-item-price-wrapper-size="col-10" product-item-read-more-text="" product-item-add-to-cart-text="" product-item-add-to-cart-custom-attribute="title='Purchase this book with single click'" product-item-thumbnail-size="290-380" show-details="false" show-excerpt="false" paginate="false" lazy-load="true"]
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
- 10 Most Common SSAT Upper-Level Math Questions
- Employing the Limit Comparison Test to Analyze Series Convergence
- How to Solve Angles and Angle Measure? (+FREE Worksheet!)
- How to Add and Subtract Complex Numbers? (+FREE Worksheet!)
- 10 Most Common TExES Core Math Questions
- 7th Grade IAR Math Practice Test Questions
- Can You Cheat on the ALEKS Test?
- 10 Most Common 3rd Grade ACT Aspire Math Questions
- 4th Grade ACT Aspire Math FREE Sample Practice Questions
- 4th Grade SBAC Math Practice Test Questions
What people say about "Number Properties Puzzle – Challenge 1 - Effortless Math: We Help Students Learn to LOVE Mathematics"?
No one replied yet.