**TRIVIA**

## The Mental Math Quiz

5 Minute Quiz 5 Min

**By: Talin Vartanian**

5 Min Quiz

Image: Wavebreakmedia Ltd/Wavebreak Media / Getty Images Plus/Getty Images## About This Quiz

Calling all math-lovers out there: If you love to multiply numbers for fun, you'll have a blast trying to multiply the numbers in this quiz together! Some questions are pretty easy, like 7 times 11 (which is 77) while others require you to know how to multiply square roots, squared and cubed numbers, and decimals together.

Let's warm up with a few practice problems. Try and guess what 10 times 5 is. The answer should come to you pretty quickly: 50! Now how about 10 times -2? Since we're multiplying one negative number and one positive number together, the answer will always be negative. So in this case, -20 is the right answer.

Now let's try to multiply square roots together. Before multiplying square roots, it's important to take the actual square root of a number first. For example, let's try and figure out what √25 times √1 is. Well, the square root of 25 is 5, since 5 times 5 is 25. The square root of 1 is 1 because 1 times 1 is 1. So, the problem becomes 25 times 1, which is 25!

Now that you've seen some warm-ups, we think you're ready to ace this mental multiplication quiz! Good luck!

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

Advertisement

**TRIVIA**

5 Minute Quiz 5 Min

**TRIVIA**

6 Minute Quiz 6 Min

**TRIVIA**

6 Minute Quiz 6 Min

**TRIVIA**

5 Minute Quiz 5 Min

**TRIVIA**

6 Minute Quiz 6 Min

**TRIVIA**

5 Minute Quiz 5 Min

**TRIVIA**

6 Minute Quiz 6 Min

**TRIVIA**

6 Minute Quiz 6 Min

**TRIVIA**
MEDIUM

6 Minute Quiz 6 Min

**TRIVIA**
MEDIUM

6 Minute Quiz 6 Min

How much do you know about dinosaurs? What is an octane rating? And how do you use a proper noun? Lucky for you, HowStuffWorks Play is here to help. Our award-winning website offers reliable, easy-to-understand explanations about how the world works. From fun quizzes that bring joy to your day, to compelling photography and fascinating lists, HowStuffWorks Play offers something for everyone. Sometimes we explain how stuff works, other times, we ask you, but we’re always exploring in the name of fun! Because learning is fun, so stick with us!

Playing quizzes is free! We send trivia questions and personality tests every week to your inbox. By clicking "Sign Up" you are agreeing to our privacy policy and confirming that you are 13 years old or over.