Number Properties Puzzle -Critical Thinking 4
This is another great and fun critical thinking puzzle to tease your brain and sharpen your basic math skills. This is for those who love math puzzles. Let's challenge your brain!
Challenge:
12 = 13
35 = 28
47 = 311
10 = ?
The Absolute Best Book to challenge your Smart Student!

The correct answer is 11.
To answer this question, we need to find the pattern. For these equations, don’t try to find a relationship between numbers on both sides. Instead, consider the digits of each number and try to find a relationship between the two digits of the number in the left side. What operation between the digits of the number in the left side can create the digits of the number of the ride side?
12 = 13 35 = 28 47 = 311 10 = ?
Find the difference of two digits of the number in the left side. That is the left digit of the number in the right side.
The digit (or digits) in the right side of the answer is created by adding the two digits of the first number. For example, 12 = 13
Difference of 2 and 1 is 1 and the sum of 1 and 2 is 3.
Therefore, the answer is 11.
1 – 0 = 1 and 1 + 0 = 1
The Absolute Best Books to Ace Algebra
Related to This Article
More math articles
- How to Identify Relations and Functions? (+FREE Worksheet!)
- Using Distributive Property to Factor Variable Expressions
- 5th Grade Common Core Math Practice Test Questions
- Bеѕt Grарhing Cаlсulаtоrѕ for Math Tеасhеrѕ
- The Ultimate MEGA Elementary Education Multi-Content Math Course
- Top 10 7th Grade FSA Math Practice Questions
- What Kind of Math Needed for Owning Your Own Business?
- FREE 6th Grade Common Core Math Practice Test
- How to Convert Repeating Decimals to Fractions? (+FREE Worksheet!)
- A Comprehensive Guide to the SfAT Test in 2026

















What people say about "Number Properties Puzzle -Critical Thinking 4 - Effortless Math: We Help Students Learn to LOVE Mathematics"?
No one replied yet.