05 - Number Properties Flashcards

1
Q

How do you know an integer is divisible by the following number: 6

A

If integer is divisible by both 2 and 3

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2
Q

How do you know an integer is divisible by the following number: 7

A

There’s no trick; must perform long division

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3
Q

How do you know an integer is divisible by the following number: 8

A

If the integer is div by 3 three times, or if the last three digits are divisible by 8.

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4
Q

How do you know an integer is divisible by the following number: 9

A

If the sum of the integer’s digits are divisible by 9 (same rule applies to 3)

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5
Q

How do you know an integer is divisible by the following number:

4

A

If divisible by 2 twice, or last two digits are div by 4

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