Flashcards in Integer Properties Deck (11)

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1

## When picking numbers

### If there are multiple numbers that satisfy the constraints, pick at least 3 examples

2

## Identifying factors

###
1. Approximate the square root

2. Test the divisibility rules for every integer less than or equal to the square root (start with 1 and stop when you reach the square root)

3. Count the "factor buddies" as well

3

## Is 1 a prime number?

### NO

4

## Is 2 a prime number?

### YES

5

## Prime numbers under 30

### 2, 3, 5, 7, 11, 13, 17, 19, 23, 29

6

## To determine whether a large number is prime

### (Use the identifying factors - approximate the square root, go from 1 to the square root and use the divisibility rules)

7

## Short cut for determining whether a number less than 100 is prime

### Test 2, 3, 5, and 7

8

## The number of prime numbers...

### ...is infinite

9

## Square of any prime number...

### ...has exactly three factors

10

## Any division problem with a QUOTIENT of 0...

### ...can have a remainder (2/7 has a remainder of 2).

11