Prime & Composite
Is 19 prime or composite? How do you know?
19 is prime because it only has one set of factor pairs.
Name four multiples of 6
6, 12, 18, 24, 30, 36, 42, 48, 54, 60
Mrs. Broda has 12 expo markers. That is 6 times as many markers as Rafi. How many markers does Rafi have?
Rafi has 2 expo markers.
Which has more mass, 50 grams or 50 kilograms?
50 kilograms
Sawyer is a little over 1 m tall. Which could be her height in centimeters?
12 cm 119 cm 1,004 cm
119 cm could be her height
Is 6 prime or composite? How do you know?
6 is composite because it has more than one set of factor pairs.
What are ALL of the factor pairs for 17?
1 and 17
There are 12 people sitting at lunch table number 1. There are 2 times as many people sitting at table 2. How many people are sitting at table 2?
24 people.
How many centimeters are in a meter?
There are 100 centimeters in a meter.
Davonte says that 21 is a prime number. Robert says 21 is a composite number. Who do you agree with? Explain your reasoning.
I agree with Robert because 21 has more than one set of factor pairs. (1, 3, 7, 21)
What is a prime number (definition)?
A number with only one set of factor pairs (1 and itself).
Name two multiples of 13
13, 26, 39, 52, 65, 78
Turner is 12 years old. Turner's grandpa is 5 times as old as Turner. How old is Turner's grandpa?
60 years old.
If the classroom is 5 meters long, how many centimeters is that?
500 centimeters long,
Which of these numbers are multiples of 9? There might be more than one right answer. 7, 18, 25, 27, 36, 42
18, 27, and 36 are multiples of 9
What is a composite number (definition)?
A number with more than one set of factor pairs.
What are ALL of the factor pairs for 24?
1, 2, 3, 4, 6, 8, 12, 24
Hazel found 9 ladybugs in the garden. This is 3 times as many ladybugs as she found on the windowsill. How many did she find on the windowsill?
3 ladybugs
Which type of linear measurement would you use to measure the length of the classroom, meters or centimeters?
What is meters?
Rule for this pattern is to add 8. Find the missing numbers: 64, 72, 80, ____, ____
88, 96
Mina says that 56 is a prime number. Zach says 56 is a composite number. Who do you agree with? Explain your reasoning.
I agree with Zach because 56 is a composite number because it has more than one set of factors pairs (1x56, 2x28, and 7x8)
What are the first 3 multiples of 9 (not including 9)?
18, 27, 36
Charlotte picked 20 flowers. That is 4 times as many as her little sister picked. How many flowers did Charlotte's sister pick?
She picked 5 flowers
Which would you use to measure the mass of a cupcake, grams or kilograms?
Grams
A small bag of goldfish crackers has a mass of 12 grams. A large bag of goldfish crackers has a mass that is 10 times as much as the small bag. What is the mass of the large bag of Goldfish crackers?
It is 120 grams.