True or False: A number is divisible by its factors
True
100
Is 57 a prime number?
No, because it is divisible by 3 because the sum of the digits is 12, which is divisible by 3
100
Mlle. Coadic has 72 croissants. If she has 18 students in her class, how many does each student get?
4 croissants
100
8 x 8 + 2 + 5 - 6
What is 65
200
What is the prime factorization of 12
What is 2 x 2 x 3
200
What are the factors of 12?
1,2,3,4,6,12
200
Is 312 divisible by 6?
Yes, because the number is divisible by 2 and 3(the rule of 6) since it is even and 3 since the sum of the digits is 6 and 6 is divisible by 3.
200
The sum of 3 consecutive numbers is 219. What are the 3 numbers?
72,73, and 74.
200
258 x 43 =
What is 11,094
300
3 x 3 x 5 is the prime factorization of what number?
What is 45
300
True or False: 2 is a factor of all even numbers
True
300
Using the digits 1,5, and 0 form a number that is divisible by 5 and greater than 500.
What is 510
300
Dan counted all the coins in his bank, and he had 72 quarters. Can he exchange the quarters for an even number of dollar bills? How do you know?
Yes, because there are four quarters in a dollar and 72 is divisible by 4
300
List 3 parts of a division problem
Quotient, divisor, and dividend
400
What is the prime factorization of 24?
What is 2 x 2 x 2 x 3
400
1,3,5,15,25,75 are the factors.
75
400
Is 4,367,923,848 divisible by 9?
Yes, because the sum of the digits is 54 which is divisible by 9
400
A small town purchased 196 American flags for its Memorial Day parade. Eight locations were selected to display the flags. Can each location have the same number of flags? Why?
No, because 196 is not divisible by 8
400
(25 x 4)(16 x 3)/(2 x 2 x 3)
Hint: / means to divide
400
500
2 x 2 x 3 x 5 x 5 is the prime factorization of what number?
What is 300
500
What is a composite number between 1 and 100 with exactly 3 factors?
4, 9, 25, or 49.
500
What numbers from 1-10 is 720 divisible by?
What is 1,2,3,4,5,6,8,9,10
500
Ms. Rones drove by a playground that was full of students and dogs. She noticed that there was a total of 40 heads and 100 feet. How many students and how many dogs were there?
30 students and 10 dogs.
500
Who is the Greek mathematician who developed a method for identifying prime numbers from 1-100?