# Rapid Fire Mental Calculation Quiz

Reviewed by Janaisa Harris
Janaisa Harris, BA (Mathematics) |
Mathematics
Review Board Member
Ms. Janaisa Harris, an experienced educator, has devoted 4 years to teaching high school math and 6 years to tutoring. She holds a bachelor's degree in Mathematics (Secondary Education, and Teaching) from the University of North Carolina at Greensboro and is currently employed at Wilson County School (NC) as a mathematics teacher. She is now broadening her educational impact by engaging in curriculum mapping for her county. This endeavor enriches her understanding of educational strategies and their implementation. With a strong commitment to quality education, she actively participates in the review process of educational quizzes, ensuring accuracy and relevance to the curriculum.
, BA (Mathematics)
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Quizzes Created: 3 | Total Attempts: 9,747
Questions: 10 | Attempts: 8,762

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Are you a pro at mental calculations? With this rapid-fire mental calculation quiz, you can see how well and quickly calculations you can make. This is a quiz that tests your mental calculation. You just need to make a quick calculation and pick the correct answer. Even if you miss out on some questions, we are here to help you with the correct answers. Go for it, and test your knowledge. Do share the quiz with others interested in math or calculations.

• 1.

### 4!+6!=

Explanation
The given expression is the sum of the factorial of 4 and the factorial of 6. The factorial of a number is the product of all positive integers less than or equal to that number. Therefore, 4! is equal to 4 x 3 x 2 x 1 which is 24, and 6! is equal to 6 x 5 x 4 x 3 x 2 x 1 which is 720. Adding these two values together gives us 744.

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• 2.

### 4+6+8+10+12+............................+96=

• A.

5050

• B.

2350

• C.

2650

• D.

3250

B. 2350
Explanation
This is an arithmetic progression with first term =4, common difference =2 and the total number of terms=47.

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• 3.

### If the adjacent and opposite sides of a right angled triangle are 5cm and 12cm respectively, what is the length of the hypotenuse?

• A.

13cm

• B.

13.5cm

• C.

14cm

• D.

14.5cm

A. 13cm
Explanation
In a right-angled triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides. Using the Pythagorean theorem, we can find the length of the hypotenuse. In this case, the adjacent side is 5cm and the opposite side is 12cm. So, the length of the hypotenuse can be calculated as âˆš(5^2 + 12^2) = âˆš(25 + 144) = âˆš169 = 13cm.

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• 4.

### 35 percent of 560=

• A.

158

• B.

246

• C.

196

• D.

246

C. 196
Explanation
10% of 560 is 56 while 5% of 560 is simply 28 (just divide 56 by 2) ; hence 35%  of 560 is equivalent to 196.

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• 5.

• A.

60

• B.

600

• C.

6

• D.

6000

B. 600
• 6.

### The odd number just before 4001 is

• A.

4000

• B.

4003

• C.

3999

• D.

4002

C. 3999
Explanation
The odd number just before 4001 is 3999 because it is the closest odd number to 4001 that is smaller than it.

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• 7.

### 765/6=

• A.

127

• B.

127.5

• C.

127.64

• D.

127.75

B. 127.5
Explanation
The correct answer is 127.5 because when you divide 765 by 6, you get a quotient of 127.5.

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• 8.

### 583 = 500 + ? + 3

• A.

80

• B.

87

• C.

103

• D.

95

A. 80
Explanation
To find the missing number, we need to subtract 500 and 3 from 583. 583 - 500 - 3 = 80. Therefore, the missing number is 80.

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• 9.

### Which number is 300 more than 5762?

• A.

5062

• B.

5792

• C.

6062

• D.

8762

C. 6062
Explanation
The number that is 300 more than 5762 is 6062. This can be determined by adding 300 to 5762, resulting in 6062.

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• 10.

### If 7 x 6 = 42, what is the other fact?

• A.

6 ÷ 7 = 42

• B.

42 ÷ 7 = 6

• C.

42 - 6 = 7

• D.

6 + 7 = 42

B. 42 ÷ 7 = 6
Explanation
The other fact is that 42 divided by 7 is equal to 6.

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Janaisa Harris |BA (Mathematics) |
Mathematics
Ms. Janaisa Harris, an experienced educator, has devoted 4 years to teaching high school math and 6 years to tutoring. She holds a bachelor's degree in Mathematics (Secondary Education, and Teaching) from the University of North Carolina at Greensboro and is currently employed at Wilson County School (NC) as a mathematics teacher. She is now broadening her educational impact by engaging in curriculum mapping for her county. This endeavor enriches her understanding of educational strategies and their implementation. With a strong commitment to quality education, she actively participates in the review process of educational quizzes, ensuring accuracy and relevance to the curriculum.

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• Current Version
• Dec 15, 2023
Quiz Edited by
ProProfs Editorial Team

Expert Reviewed by
Janaisa Harris
• Mar 01, 2012
Quiz Created by
Whitecorp

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