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Published byBelinda Stevenson Modified about 1 year ago

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ALL NUMBERS HAVE 1 AS A FACTOR!

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Even numbers! Numbers ending in 0, 2, 4, 6, 8 Example: › › __________2 = even number › 2 is a factor!

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When you add up the digits, the number is divisible by 3 Example: › 489 › 4+8+9=21 › 21/3=7 › Therefore 3 is a factor of 489

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If the last 2 digits are divisible by 4, then the whole number is! Example: › 344 › _44/4 =11 › 344 has 4 as a factor!

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Always ends in 0 or 5 Example: › › _____0 › This number has 5 as a factor!

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If you already know the number has the factors 3 and 2, then it also has 6! Example: › 336 › __6= even number; 2 is a factor! › 3+3+6=12 12/3=4; 3 is a factor! › If 2 and 3 are factors, 6 is a factor!

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No special rule for 7s I guess you guys will just have to study them harder…

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If the last 3 numbers are divisible by 8, then 8 is a factor! Example: › 7168 › _168/8=_21 › This has a factor of 8!

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When you add up the digits, the number is divisible by 9! Example: › 288 › 2+8+8=18 › 18/9=2 › This number has a factor of 9!

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Number that end in 0! Example: _______0 This number has a factor of 10!

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