LIST 5 MULTIPLES!
Multiples of 5?
5,10,15,20,25
Factors of 9?
1 x 9
3 x 3
(1, 3, 9)
Is 4 prime or composite?
4 is Composite.
1 x 4
2 x 2
Rule: Add 8
What's the next number? 19, 27, 35, ___
43
What's the divisibility rule for 2?
Last digit is EVEN.
Number ends in 2,4,6,8,0!
Multiples of 7?
7,14,21,28,35
Factors of 12?
1 x 12
2 x 6
3 x 4
(1, 2, 3, 4, 6, 12)
Is 23 a prime or composite number?
23 is Prime.
1 x 23
Rule: Multiply 9
What is the next number in the pattern?
10, 90, 810, ____
7,290
What's the divisibility rule for 5?
What's the divisibility rule for 10?
5: Last digit of the number MUST be 0 or 5.
10: Last digit of the number MUST be 0.
Multiples of 8?
8,16,24,32,40
Factors of 24?
1 , 24
2 , 12
3 , 8
4 , 6
(1, 2, 3, 4, 6, 8, 12, 24)
Is 99 a prime or composite number?
99 is composite.
1 x 99
9 x 11
Rule: Start with 3 and add 5
What are the next three numbers in the pattern?
3, 8, 13, ___, ____, ____
18, 23, 28
What are five numbers, that you know automatically, have a factor of 2, 5, and 10?
Answers may vary - Any number that ends in 0.
Multiples of 12?
12,24,36,48,60
Factors of 49?
1 x 49
7 x 7
(1, 7, 49)
Is 51 a prime or composite number?
51 is Composite.
1 x 51
3 x 17
Rule: Add 6
What is the 5th number in the pattern?
Start with: 17 (then add 6)
47
What are three numbers that are divisible by BOTH 2 and 10?
Answers will vary -- had to end in 0.
Multiples of 15?
15,30,45,60,75
Factors of 36?
1 x 36
2 x 18
3 x 12
4 x 9
6 x 6
(1, 2, 3, 4, 6, 9, 12, 18, 36)
Is 57 a prime or composite number?
57 is Composite.
1 x 57
3 x 19
What is the rule for the pattern?
61, 56, 58, 53, 55, 50, 52
What's the divisibility rule for 3 & 9? Then, give a two digit number that is divisible by BOTH 3 and 9.
3: add all the digits up and divide by 3.
9: add all the digits up and divide by 9.
Example Answers: 18, 27, 54, 63, etc.
(has to add up to 9)