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Question 1

12 X 4

Answer 1

48

Question 2

12 X 5

Answer 2

60

Question 3

12 X 6

Answer 3

72

Question 4

length of triangle sides

Answer 4

less than sum of 2 sides, greater than difference

Question 5

12 X 7

Answer 5

84

Question 6

12 X 8

Answer 6

96

Question 7

12 X 9

Answer 7

108

Question 8

12 X 11

Answer 8

132

Question 9

12 X 12

Answer 9

144

Question 10

2^4

Answer 10

16

Question 11

2^5

Answer 11

32

Question 12

2^6

Answer 12

64

Question 13

2^7

Answer 13

128

Question 14

2^8

Answer 14

256

Question 15

2^9

Answer 15

512

Question 16

2^10

Answer 16

1024

Question 17

11^2

Answer 17

121

Question 18

13^2

Answer 18

169

Question 19

14^2

Answer 19

196

Question 20

15^2

Answer 20

225

Question 21

16^2

Answer 21

256

Question 22

Divisible by 3?

Answer 22

sum of digits = multiple of 3

Question 23

Divisible by 4?

Answer 23

Last two digits are divisible by 4

Question 24

Divisible of 6?

Answer 24

Even and sum of digits is multiple of 3

Question 25

Divisible by 9?

Answer 25

Sum of digits is multiple of 9

Question 26

Multiplication w/ decimals

Answer 26

Multiply as normal… count decimals places… answer has same number of decimals

Question 27

144 / 1.2

Answer 27

144/12 -> 12 -> 120

Question 28

1.44 / 12

Answer 28

144/12 -> 12 -> .12

Question 29

Multiple

Answer 29

negative numbers are multiples

Question 30

Checking prime numbers between A and B

Answer 30

only have to check up to n where n^2 is less than B

*check

Question 31

Unique factor trick (how man unique factors does n have?)

Answer 31

Find prime factors (i.e. 2,2,3,7) –> take exponents (2, 1, 1) –> add 1 to exp and multiply together –> 3X2X2 = 12

Question 32

Zero?

Answer 32

even, multiple of every number, factor of no number, neither pos or neg

Question 33

65

Answer 33

5 X 13

Question 34

What can’t you do with inequalities?

Answer 34

Subtract!

Question 35

30 : 60 : 90

Answer 35

1 : rt(3) : 2

Question 36

45 : 45: 90

Answer 36

1 : 1 : rt(2)

Question 37

Equilateral triangle

Answer 37

All angles are 60 deg

Question 38

Area //-ogram

Answer 38

b * h

Question 39

Area of trapezoid

Answer 39

(1/2) * (b+b) * h

Question 40

Area (equil. triangle)

Answer 40

s^2rt(3)(1/4)

*check

Question 41

Inscribed angles

Answer 41

Central angle = inscribed *2

Question 42

Check yo self

Answer 42

0 and 1
pos/neg
non-int

Question 43

x^2 < x

Answer 43

x = between 0 and 1

Question 44

DS: why are you here?

Answer 44

violate CNS (clearly ns)

Question 45

have x^2

Answer 45

look for quadratic

Question 46

when x is divided by 3, the remainder is 2

Answer 46

x = 2, 2+3 (5), 8, 11, 14

Question 47

Probability (E or F)

Answer 47

P(E) + P(F) - P(E and F)

Question 48

Circular permutions

Answer 48

of ways to arrange n distinct objects along a circle is (n-1)!

Question 49

Common triangles

Answer 49

3-4-5 ;
5-12-13;
9-12-15.

Question 50

Distance

Answer 50

Rate X Time

Question 51

rt(2) and rt(3)

Answer 51

1.4; 1.7

Question 52

A(union)B

Answer 52

= A + B - A(int)B

Question 53

Percent change

Answer 53

(new - orig) / orig * 100

Question 54

Similar triangle

Answer 54

if sides are X 2 —> area is X 2^2 (4)

Question 55

V(sphere)

Answer 55

(4/3)pir^3

Question 56

avg speed

Answer 56

total dist / total time

Question 57

simple interest earned

Answer 57

P X rate X years = total interest earned

Question 58

Compound Interest

Answer 58

Final Balance = (principal)(1+r/C)^(nC)
n = time
C = number of times compounded
i.e.) $10,000 compounded quartertly at 8% = 10k2/100 + 10k… New amount2/100+new amount… etc

Question 59

Total (Venn Diagram)

Answer 59

Total = X + Y - Both + Neither

Question 60

Terminating decimal?

Answer 60

Reduce to simplest terms–> must be only 2s and 5s in denominator

Question 61

LCM

Answer 61

Finds prime factors –> take highest power which each occur and multiply. –> 6 = 2 X 3. 9 = 3 X 3. LCM = 3X3X2=18

Question 62

GCF

Answer 62

Of then have to be on both (2X3X3X5)