Rules Of Divisibility Flashcards

1
Q

Es divisible por 2 si…

A

0,2,4,6,8

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2
Q

Divisible por 3

A

Si la suma de los dígitos es divisible por 3

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3
Q

Por 4

A

Si los dos últimos dígitos son divisibles 4

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4
Q

Divisible por 6

A

Por 3 y por 2

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5
Q

Por 8

A

Si los tres últimos dígitos son divisible por 8

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6
Q

Por 9

A

Si la suma de todos es divisible por 9

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7
Q

How to find number of factors of a number

A

Prime factors and multiply powers +1

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8
Q

How to find number of powers of x in a factorial

A

Factorial/X y vas subiendo de power hasta que sea <1

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