Math review

Question 1

any integer divisible by 2

Answer 1

is even integer

Question 2

any integer not divisible by 2 is

Answer 2

odd integer

Question 3

if at least one factor is even, the the product is

Answer 3

even

Question 4

if both are odd, then product is

Answer 4

odd

Question 5

if both integers are even or odd, then sum/differene is

Answer 5

even

Question 6

if one integer is even and other is odd, then sum/difference is

Answer 6

odd

Question 7

sum of the interior angles of a polygon equation

Answer 7

(n-2)180

Question 8

distance =

Answer 8

rate *time

Question 9

working together or alone rate problem formula:

Answer 9

1/r + 1/s = 1/h

each variable is in hours

Question 10

interest problem: simple annual int formula

Answer 10

princ * interest rate * time

Question 11

gross profit =

Answer 11

revenues - cost

Question 12

pi =

Answer 12

3

Question 13

sq rt (1)

Answer 13

1

Question 14

sq rt(2)

Answer 14

1.4

Question 15

sq rt(3)

Answer 15

1.7

Question 16

sq rt(4)

Answer 16

2

Question 17

Permutation, single source, order matters

for a problem that asks you to choose from the same source to fill specific spots, all you have to do is multiply the number of choices for each of the spots - but the number of choices keeps getting smaller.

3 basketball teams play in a league against each other. At the end of the season, how many different ways could the 3 teams end up against each other?

Answer 17

321 = 6

Question 18

permutation =

Answer 18

arrangements

Question 19

combination =

Answer 19

groups

Question 20

6 horses in race. how many different groups of horses make up the top 3 horses?

Answer 20

groups = combination
n! / r! (n-r)!

6! / 3! * 3!

Question 21

percent change

Answer 21

difference/original * 100