Factors and multiples
What are the factors for 11?
1,11
Is the number 47 prime or composite?
Prime
The equation 5 X 4 = 20 can mean:
A. 5 rulers and 5 rulers together are 20 rulers.
B. 5 notebooks divided into 4 groups is 20 notebooks.
C. The difference between 5 pencils and 4 pens is 20.
D. 20 pencils are five times as many as the 4 pencils on the teacher's desk.
D. 20 pencils are five times as many as the 4 pencils on the teacher's desk.
A single piece of bread has a mass of 30 grams. The whole loaf of bread has a mass that is 10 times as much as the single piece of bread. What is the mass of the loaf of bread?
The mass of the loaf of bread is 300 grams.
How many centimeters is in a meter?
There are 100 centimeters in a meter.
What are the factors for 21?
1, 3, 7, 21
Is the number 25 prime or composite?
Composite
Steve is 13 years old. His mother is three times as old as Steve. How old is Steve's mother?
Steve's mother is 39 years old.
The rule for this pattern is add 8. Find the missing numbers.
184, 192, 200, 208, ____, ____
216, 234
Which is larger, a kilometer or a meter?
A kilometer is larger.
How many factors does the number 12 have?
6
What is the difference between a prime and composite number?
A prime number has 1 factor pair and a composite number has more than 1 factor pair.
Jan sees 9 apples in her apple tree. This is 3 times as many apples as she has in her house. How many apples does Jan have in her house?
Jan has 3 apples in her house.
The rule for this pattern is add 4. Find the missing numbers.
____, _____, 112, 116, 120
104, 108
How many milliliters are in 4 liters.
There are 4,000 milliliters in 4 liters.
Write 4 multiples for the number 8
Ex: 8, 16, 24, 32, 40, 48, 56, 64, etc.
Sarah says that the number 49 is prime. Johnny says that the number 49 is composite. Who is right? Explain your reasoning.
Johnny is right because the number 49 has more than 1 factor pair.
Lacy had 18 milliliters of blue paint and 43 milliliters of yellow paint. She mixed them together to make green paint. How many milliliters of green paint does she have now?
Lacy has 61 milliliters of green paint.
Which of these numbers are multiples of 9? 3, 1, 9, 81, 62, 45
9, 81, and 45
A CD weighs 15 grams. A suitcase weighs 15 kilograms. What object has the greater mass? How do you know?
The suitcase has the greater mass because the suitcase weighs 15,000 grams and 15,000 grams is bigger than the 15 grams of the CD.
If Ken makes an array of sticky notes with the dimensions of 3 and 6, what other unique arrangements can he make with the same number of sticky notes?
Ken can make arrangements that are 1 by 18 and 2 by 9.
If the dimensions of a rectangle are 1 and 8, would the area of the rectangle be prime or composite?
Composite
A pan has 6 cookies on it. Another pan has 3 times as many cookies as the first pan. Anthony baked 10 more cookies. How many cookies are there in all?
There are 34 cookies in all.
The first number in the pattern is 0. The rule is to add 25.
0, 25, 50, 75, ... Which is true?
A. The number in the ones digit switches between 0 and 5.
B. All numbers in the pattern are even.
A. The number in the ones digit switches between 0 and 5.
Sarah swam 25 meters in the pool. How many centimers did she swim?
Sarah swam 2,500 centimeters.