Prime or Composite
A ________ number is a number where the only factors are 1 and itself.
Prime
Solve:
12 x 6 - (7 + 5)
60
There are 182 students at sky ranch. Each cabin houses 14 students. There are 3 chaperones for each cabin. Which equation can be used to find c, the total number of chaperones at sky ranch?
A. (182/14) x 3=c
B. (182/14) + 3 =c
C. (14 x 3) +182=c
D. 3 x (182/14)= c
A. 182/14) x 3=c
A pair of Air Pods costs $89. Beats by Dre headphones costs twice as much. Which equation can be used to find the total cost, t, of Air pods and Beats by Dre.
A. ( 89 x 2 ) + 89 = t
B. ( 89 + 2 ) + 89 = t
C. 89 + 89 = t
D. 89 x 2 = t
D. 89 x 2 = t
How many factor pairs does the number 36 have?
List the factors
5 PAIRS: 1 and 36, 2 and 18, 3 and 12, 4 and 9, 6 and 6.
1, 2, 3, 4, 6, 9, 12, 18, 36
Which 2 numbers are composite?
59, 93, 39
93 and 39
Solve:
24 + (3+2) x 5 + 2
51
Madeline is making candy bags for her friends. She has a bag of candy that has 20 pieces and a bag of candy that has 15 pieces. If she is making candy bags for 5 friends, how many pieces of candy, c, will each friend receive?
A. 20 + 15 x 5 = c
B. ( 20 + 15 ) ÷ 5 = c
C. ( 15 + c ) ÷ 5 = 20
D. ( 5 x 20 ) – 15 = c
B. ( 20 + 15 ) ÷ 5 = c
List the factors for the number 20.
1, 2, 4, 5, 10, 20
Jake bought dinner for his hockey team. He bought 16 ham sandwiches and 12 chicken salad sandwiches. He got twice as many turkey sandwiches as chicken salad. Write an equation for this problem and solve to find out how many sandwiches he bought total.
16 + 12 + (12x2)
52
Sam says that every even number is composite. Is that true or false?
False. The number 2 is even and prime.
Solve:
4 x 3 + 2(7 x 2 - 4)
32
Charlie is packing up his books to donate to charity. Each box holds 9 books. He has 24 science fiction books and 27 mystery books to pack. What equation can be used to find, b, the total number of boxes he will need to pack all of the books?
A. ( 24 + 7 ) – 9 = b
B. ( 24 + 27 ) ÷ 9 = c
C. ( 24 + 27 ) x 9 = b
B. ( 24 + 27 ) ÷ 9 = c
List the factors of 53
1, 53 (prime number)
Solve the equation, then show if the answer is prime or composite:
100 - 5 - 4 x 3 + 5
87, Composite.
Which number is NOT prime?
31, 37, 41, 63
63
Solve:
(52 - 30) x (2 x 2) / 11
8
4. A pair of Air Pods costs $89. Beats by Dre headphones costs twice as much. Which equation can be used to find the total cost, t, of Air pods and Beats by Dre.
A. ( 89 x 2 ) + 89 = t
B. ( 89 + 2 ) + 89 = t
C. 89 + 89 = t
D. 89 x 2 = t
A. ( 89 x 2 ) + 89 = t
Solve: 3(4x3) + 7(18/2)
99
[6+3x4(4/2)] + 9/3+(4x2)
41
1 and 41
41 is prime
Is the sum of 64 and 33 prime or composite?
97- Prime
Solve:
4 + [6 x (25/5)] - 26
8
Ms. Usher and Ms. Walters are organizing binder clips and paperclips. Ms. Usher has 124 binder clips. Ms. Walters has half as many binder clips as Ms. Usher. Together, they have 87 paperclips. How many binder clips and paperclips do they have combine. WRITE THE EQUATION
124 + (124/2) + 87
or
124 + 124/2 + 87
List the factors of 72
1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72
Kelly solved the equation below and said the answer was composite. Was she correct?
[(6x4)-3+2] + (8/4 x 2 +3)
Yes, 30 is composite