Addition of integers
even + even = even
odd + odd = even
odd + even = odd
Multiplication of Integers
even x even = even
odd x odd= odd
odd x even = even
an-a 1 + (n-1)d
1) plug arith seg and 1st term to n
2) get d
3) plug FIFTH term in n and 5
an= a1 r n-1
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
Numbers divided evenly
Ex. 15 is divisible by 5
Numbers divided by that given number without a remainder
Ex: 8, 16, 24... multiples of 8
Greatest common factor
Least common multiple
two ratios are set equl to each other
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