Factors
List all of the factors of 16.
1,2,4,8, and 16.
Tell whether 37 is prime or composite.
List the first five multiples of 7.
7,14,21,28,35
Multiply or divide to find an equivalent fraction to 9/12.
Answers may vary
Example:
9/12 ÷ 3 = 3/4
9/12 X 2 = 18/24
Compare 1/2 and 4/5. Use <, >, or =.
1/2 < 4/5
5/10<8/10
Write 24 as a product of two factors in two different ways.
Examples:
1x24=24 3x8=24
2x12=24 4x6=24
Tell whether 85 is prime or composite.
85 is composite:
1x85=85
5x17=85
Tell whether 27 is a multiple of 3. How do you know?
Yes, 27 is a multiple of 3. I know this because 3x9=27.
Josh, Lisa, and Vicki each ate 1/2 of a pizza. The pizzas were the same size, but Josh ate 1 slice, Lisa ate 3 slices, and Vicki ate 4 slices. How is this possible?
Josh's pizza had 2 slices so he ate 1/2
Lisa's pizza had 6 slices so she ate 3/6 =1/2
Vicki's pizza had 8 slices so she ate 4/8 = 1/2
Mary says that 1/8 is greater than 1/4 because 8 is greater than 4. Is she right? Explain your answer.
No, 1/8 is not greater than 1/4. The greater the denominator, the smaller the piece.
*I would rather share a pizza with 4 friends than 8!
What factor does every even number have?
2
What is the only even prime number?
2
Which is NOT a multiple of 7?
A. 20 B. 21
C. 35 D. 42
20 is NOT a multiple of 7.
Suppose Lee's pizza had 12 equal slices instead of 4. How many slices are gone if he ate 1/4 of the pizza?
3 slices are gone.
What can you conclude about 3/5 and 12/20 if you know that 3/5 = 6/10 and that 6/10 = 12/20?
3/5 is equivalent to 12/20
3/5 x 4 = 12/20
Jean's brother has 100 action figures. What are all of the factors for 100?
1,2,4,5,10,20,25,50, and 100
Roger has 47 cars. Can he group the cars more than 1 way?
No he cannot.
47 is a prime number.
Name at least one number that is a multiple of 2 and a multiple of 5.
Examples:
10,20,30,40,50,60,etc.
Which shows 1/2 and 1/5 as fractions with the same denominator?
A. 5/10 and 2/10 B. 1/10 and 5/10
C. 5/10 and 1/10 D. 5/10 and 3/10
A. 5/10 and 2/10
A melon was divided into 8 equal slices. Juan ate three slices. Tom and Stacy ate the remaining slices. What fraction of the melon did Tom and Stacy eat?
A. 1/4 B. 2/8
C. 2/3 D. 5/8
D. 5/8
Anita wants to include an array of 15 photos on her website. Describe the arrays that she can make.
Anita can make a:
1 by 15 array (1x15) OR 15 by 1 array (15x1)
3 by 5 array (3x5) OR 5 by 3 array (5x3)
Give an example of an odd number that is not prime. What makes it a composite number?
Answer will vary.
Example: 21
1x21=21
3x7=21
Lindsay says that all multiples of 4 have a factor of 2. Is Lindsay correct? Explain.
Yes, Lindsay is correct. All multiples of 4 are even numbers, therefore each has a factor of 2.
In a school poetry contest, 4 out of the 12 students who entered will win a small prize. Half of the remaining students receive a certificate. How many students get a certificate?
4 students will receive a certificate.
Neil is setting up for a dinner party. He has 6 tables each seating 5 guests and another table seating the left over 3 guests. How many people are coming to Neil's dinner party?
33 guests are coming to his party.