Which of the following is a quick and accurate way to test if a number is prime?

Only test numbers less than the square root of that number.

See if it is divisible by 2 or 3 only.

See if every number less than that number divides into it.

Only test numbers less than half of that number.

All of these are either incorrect or are not very quick.

A Fun Quiz About Math!

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| By Christine_6

Christine_6

Community Contributor

Quizzes Created: 1 | Total Attempts: 117

Questions: 7 | Attempts: 117 | Updated: Mar 21, 2023

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A fun quiz about math!

Questions and Answers

1.

What do you think of this video?
2.

Solve xy=1 for x.
- A.
  
  X = y
- B.
  
  X = 1/y
- C.
  
  y = 1/x
- D.
  
  X = 1
- E.
  
  The answer is not shown.
Correct Answer
B. X = 1/y

Explanation
The given equation xy=1 can be solved for x by isolating x on one side of the equation. By dividing both sides of the equation by y, we get x = 1/y.

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3.

What type of flower is shown?

Correct Answer
sunflower

Explanation
The correct answer is sunflower because the question asks for the type of flower shown, and the word "sunflower" is provided as the answer. Therefore, it can be inferred that the flower shown in the question is a sunflower.

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4
4.

What is cool about math?
- A.
  
  Everything
- B.
  
  Nothing
- C.
  
  It is universal
- D.
  
  Albert Einstein
Correct Answer(s)
A. Everything
C. It is universal
D. Albert Einstein

Explanation
The answer "everything, it is universal, Albert Einstein" suggests that there are multiple reasons why math is cool. The first reason is that math encompasses everything, implying that it is applicable in various fields and has a wide range of applications. The second reason is that math is universal, indicating that its principles and concepts are consistent and applicable across different cultures and societies. Lastly, the mention of Albert Einstein implies that math is cool because it was a subject of interest and study for the renowned physicist.

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5.

What is your favorite thing to do for fun?
6.

What is the square root of 169?
- A.
  
  11
- B.
  
  12
- C.
  
  13
- D.
  
  28561
- E.
  
  The answer is not shown.
Correct Answer
C. 13

Explanation
The square root of a number is a value that, when multiplied by itself, gives the original number. In this case, the square root of 169 is 13 because 13 multiplied by itself equals 169.

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7.

Which of the following is a quick and accurate way to test if a number is prime?
- A.
  
  See if it is divisible by 2 or 3 only.
- B.
  
  See if every number less than that number divides into it.
- C.
  
  Only test numbers less than the square root of that number.
- D.
  
  Only test numbers less than half of that number.
- E.
  
  All of these are either incorrect or are not very quick.
Correct Answer
C. Only test numbers less than the square root of that number.

Explanation
Testing numbers less than the square root of a given number is a quick and accurate way to determine if it is prime. This is because if a number is not prime, it can be factored into two smaller factors. If both factors are greater than the square root of the number, then their product would be greater than the original number. Therefore, if a number is not divisible by any number less than its square root, it is prime.

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A Fun Quiz About Math!

What do you think of this video?

Solve xy=1 for x.

What type of flower is shown?

What is cool about math?

What is your favorite thing to do for fun?

What is the square root of 169?

Which of the following is a quick and accurate way to test if a number is prime?