When the sum of the digits add up to a number divisible by 3.
100
The difference between prime and composite numbers.
What is prime is only divisible by one and itself, composite is divisible by more factors than just one and itself?
200
The factors of 22.
What is 1, 2, 11, and 22?
200
The prime factorization of 144.
What is 2 x 2 x 2 x 2 x 3 x 3?
200
The GCF of 18 and 27.
What is 9?
200
The divisibility rules for 2 and 5.
What is even for 2? What is ending in a 0 or a 5 for 5?
200
Mrs. Weidner has 18 boys and 27 girls in the choir. If she wants them to stand in equal rows of only boys and only girls, how many rows will she need them to be in?
What is 9?
300
The factors of 29.
What is 1 and 29?
300
The prime factorization of 96.
What is 2 x 2 x 2 x 2 x 2 x 3?
300
The GCF of 26 and 65.
What is 13?
300
When is a number divisible by 9
When the sum of the digits of the number is divisible by 9.
300
A radio station is having a promotion in which every 12th caller receives a free concert ticket and every 15th caller receives a limo ride. Which caller will be the first one to win both?
What is 60th caller?
400
The factors of 48.
What is 1, 2, 3, 4, 6, 8, 12, 16, 24, and 28?
400
The prime factorization 95.
What is 5 X 19?
400
The GCF of 60 and 25.
What is 5?
400
The rules for a number being divisible by 4
What is looking at the last 2 digits of the number, if they are divisible by 4, the number is?
400
The numbers that can divide this number: 38,475
2, 3, 4, 5, 6, 9
What are: 3, 5, 9?
500
The factors of 100.
What is 1, 2, 4, 5, 10, 20, 25, 50, and 100?
500
The prime factorization of 156.
What is 2 x 2 x 3 x 13?
500
The GCF of 64, 84, and 120.
What is 4?
500
The divisibility rules for 6
What is divisible by 2 and 3?
500
The numbers that this number is divisible by: 782,340
2, 3, 4, 5, 6, 9