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!
When you multiply 7 times 7, you get 49. This means that the square root of 49 is also 7.
When you multiply 5 and 6 together, you get 30. As the hint implied, 20 + 10 is also 30.
The answer is 0. When you multiply anything by 0, the answer is 0.
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20 is the right answer. When you multiply any number, like 20, 5, or 10 by 1, the answer is still 20, 5, or 10.
The answer is 33. Another example is 11 times 4 is 44, and 11 times 5 is 55.
When you multiply 10 and 10 together, you get 100. This means that the square root of 100 is 10.
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-1 is the right answer. When you multiply a positive and a negative number together, the answer is always negative.
2 + 2 is 4 and -2 times -2 is also four. When you multiply two negative numbers together, the answer is always positive.
125 is the right answer. Another way to rewrite this is 5(5)(5) or 25(5).
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6 is the correct answer. Another way to rewrite this is 3(2)(1). 3(2) is 6 and 6(1) is 6.
5 is the correct answer. When you multiply a number by .5, you're just cutting that number in half.
-27 is the right answer. Look at the problem like this: 3(-3)(3), which is -9(3) which is -27.
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6 is the correct answer. When you multiply 24 by .25, you're just separating that number into fourths, or quarters. In other words, 6(4) is 24, which is the same thing as 24 times .25.
1/4 or .25 is the right answer. When you multiply .50 and .50 together, you get a smaller number, which is .25.
50 is the right answer. When you multiply a number by 2, you're just doubling that number.
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The answer is 75. When you multiply a decimal by 100, you're just moving that decimal to the right two times.
The answer is 150. When you multiply a decimal by 1000, all you have to do is move the decimal over to the right three times, hence .15 becomes 150.
-80 is the right answer. When you multiply three negative numbers together, the answer is always negative.
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The answer is 15. Here's why: the square root of 25 is 5 and the square root of 9 is 3. 5 times 3 is 15.
The right answer is 24. The square root of 9 is 3, the square root of 16 is 4 and the square root of 4 is 2. 3 times 4 times 2 is 24.
The correct answer is 4. -√4 is -2, since the square root of 4 is 2, but there is a negative sign in front, so it becomes -2. -2 times -2 is 4.
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The answer is 0. √1 is 1 and √0 is 0, so 1 times 0 is 0.
36 is the right answer. 2² is 4 and 3² is 9, so 4 times 9 is 36.
27 is the right answer. 3³ is 27 since it's basically 3(3)(3). 1³ is 1, so 27 times 1 is 27.
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-125 is the right answer. 5² is 25, so 25 times -5 is -125.
If you guessed -32, you're right! √4 is 2 and (2²) is 4, so the problem is just 2 times -4 times 4, which is -32.
-5 is correct. Multiplying a number by .25 is just quartering that number, so when you quarter 20, you get 5. But since .25 is negative, it becomes -5.
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The right answer is 5. √100 is 10 and 10 times .50 is 5.
The answer is 5. -√25 is -5 because the square root of 25 is 5, but since there is a negative sign in front, it becomes -5. -5 times -1 is 5.
50 is the right answer. 50% can be rewritten as .50, and .50 times 100 is 50 (it's just half of 100).
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The answer is .60. While the problem looks tricky, just break it down step by step. √36 is 6, since 6 times 6 is 36. 10% can be rewritten as .10, so now the problem is .10 times 6, which is .6. You're just moving the invisible decimal place in front of the 6 to the left once.
1000 is the right answer. 10 times 10 is 100 and 100 times 10 is 1000.
-60 is the right answer. When you multiply a positive number and a negative number together, you get a negative number.
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50 is the right answer. 10 times 5 is 50, which means 50/10 is 5 and 50/5 is 10.