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Understanding Division and Prime Numbers

Understanding Division and Prime Numbers

Assessment

Interactive Video

Mathematics, Science, Fun

5th - 8th Grade

Practice Problem

Hard

Created by

Sophia Harris

FREE Resource

The video tutorial explains a curious calculation involving a four-digit number. First, the number is entered twice into a calculator to form an eight-digit number. This number is then divided by 137, resulting in a whole number. Finally, dividing this result by the original four-digit number always yields 73. The tutorial encourages viewers to try this calculation and explore why the result is consistently 73.

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5 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first step in the curious calculation involving a four-digit number?

Divide the number by 137

Enter the number twice to form an eight-digit number

Subtract 137 from the number

Multiply the number by 73

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens when you divide the eight-digit number by 137?

It becomes zero

It results in a random number

It is not divisible

It results in a specific quotient

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is the number 137 significant in this calculation?

It is a prime number

It is the original four-digit number

It is the number of steps in the process

It is the result of the final division

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the final result when you divide the quotient by the original four-digit number?

It is always 411136

It varies depending on the number

It is always 73

It is always 137

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the consistent outcome of the entire calculation process?

The result is always zero

The result is always 137

The result is always 73

The result is always 411136

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