Multiplication
Calculate
7xx8
56
What is 5 less than zero?
-5
What are the factors of 8?
1, 2, 4, 8
What is a prime number?
A number with only two factors, one and itself.
List the first five multiples of 6.
6, 12, 18, 24, 30
Calculate
11xx9
99
What number is 4 less than 1?
-3
What are the factors of 15?
1 and 15
3 and 5
"2 is the only even prime number"
True or False?
True
List the first five multiples of 9.
9, 18, 27, 36. 45
Calculate
21xx8
168
What number is 6 less than -2?
-8
What are the factors 80?
1 and 80
2 and 40
4 and 20
5 and 16
8 and 10
"1 is a prime number"
True or False?
False!
List the first five multiples of 12.
12, 24, 36, 48, 60
Calculate
36xx25
900
What number is 11 more than -1?
10
What are the factors of 96?
1 and 96
2 and 48
3 and 32
4 and 24
6 and 16
8 and 12
Give the first 7 prime numbers.
2, 3, 5, 7, 11, 13, 17
What does LCM stand for?
Lowest Common Multiple
Calculate
110xx30
3300
What number is 13 more than -7?
6
Highest Common Factor
Give the prime numbers between 20 and 50.
23, 29, 31, 37, 41 and 47
Find the LCM of 4 and 6.
12
Calculate
-5+3
-2
What is the HCF of 12 and 16?
4
Calculate
4xx-8
-32