# SAT chi chis

### 10 terms by asianeekamkee

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even + even = even
odd + odd = even
odd + even = odd

### Multiplication of Integers

even x even = even
odd x odd= odd
odd x even = even

### Arithmetic Sequence

an-a 1 + (n-1)d
Ex.
1) plug arith seg and 1st term to n
2) get d
3) plug FIFTH term in n and 5

### Geometric Sequence

an= a1 r n-1

Example
1) plpug FIFTH TERM in an and FIRST TERM IN N-1 (DON'T MINUS N)
2) get r
3) plug EIGHTH TERN in an and 8 in n

### Factors

Numbers divided evenly

Ex. 15 is divisible by 5

### Multiples

Numbers divided by that given number without a remainder

Ex: 8, 16, 24... multiples of 8

### GCF

Greatest common factor

### LCM

Least common multiple

%/ 100

### proportion

two ratios are set equl to each other

Example:

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