Properties Of Numbers Flashcards
Find the one number in each line which is prime
18, 19, 20, 21
19
Find the one number in each line which is prime
8, 9, 10, 11, 12
11
Find the one number in each line which is prime
36, 37, 38, 39, 40
37
Find the two numbers in each line which are prime
14, 17, 21, 27, 29, 39
29, 17
Find the two numbers in each line which are prime
41, 45, 49, 51, 63, 67
41, 67
Find the two numbers in each line which are prime
2, 57, 71, 81, 91, 93
2, 71
How many prime numbers are there between 1 and 100?
25
What is two prime numbers that add to another prime number?
2+3 = 5
What are all the factors of this number?
6
1,6,2,3
What are all the factors of this number?
4
2,1,4
What are all the factors of this number?
18
1, 18, 2, 9, 3, 6
What are all the factors of this number?
60
1, 60, 2, 30, 3, 20, 4, 15, 5, 12, 6, 10
What are all the factors of this number?
36
1, 36, 2, 18, 3, 12, 4, 9, 6
What are the first four multiples of
3
3, 6, 9, 12
What are the first four multiples of
9
9, 18, 27, 36
What are the first four multiples of
20
20, 40, 60, 80
25, 30, 35, and 60 are all the multiples of ?
5
Which one is wrong
Multiples of 6: 18, 24, 32, 48, 54
32
Which one is wrong
Multiples of 11: 33, 77, 101, 132
101
Which one is wrong
Multiples of 10: 5, 10, 20, 30, 60
5
Write either multiple or factor in the space
15 is a ? of 5
Multiple
Write either multiple or factor in the space
8 is a ? Of 32
Factor
Write either multiple or factor in the space
9 is a ? Of 90
Factor
