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Elementray Math
Question | Answer |
---|---|
Divisibility by 2 | End Digits must be divisible by 2 |
Divisibility by 5 | End Digits must be end in 0 and 5 |
Divisibility by 10 | End digit must be 0 |
Divisibility by 4 | Last 2 Digits represent a number divisible by 4 |
Divisibility by 8 | Last 3 Digits represent a number that is divisible by 8 |
Divisibility by 3 | Sum of digits is divisible by 3 |
Divisibility by 9 | Sum of digits are divisible by 9 |
Divisibility by 6 | Integer is divisible by both 2 and 3 |
Prime Number | A counting number greater than one is prime if it has exactly two distinct factors: 1 and itself |
Composite Number | A counting number is composite if it has more than two distinct factors |