Primes and Squares
What is the only even prime number?
2
Solve
257 + 376
633
What are the first 3 multiples of 7?
7, 14, 21
List all the factors of 20.
1, 2, 4, 5, 10, 20
3 x (4 + 2) -6
12
What is the value of the digit 7 in the number 237,590?
seven thousand (or 7 thousand or 7000)
5 + 7 (or 7 + 5)
Solve
64.08-17.95
46.13
What is the smallest common multiple between 7 and 5?
35
List all the factor pairs of 12.
1 xx 12
2 xx 6
3 xx 4
15/3 + 2 - 5
2
Solve
7306-2158
5148
1, 4, 9, 16, 25
Work out
3.79xx10
37.9
What is the least common multiple between 6 and 8?
24
How many factors does 19 have?
2 (19 is a prime number!)
19 - 24/3 + 4
15
Solve
32.58 + 20.3
52.88
Calculate
8^2 + 2^2
64 + 4 = 68
Work out
0.75 div 100
0.0075
What is the least common multiple of 8 and 9?
72
What are all the common factors of 6 and 15?
1, 2, 3
5 + (12 - 2 xx 3) - 1
10
Solve
5/6-1/4
10/12-3/12=7/12
Write 16 as a product of two square numbers.
4 xx 4 or 1 xx 16
Work out 10% of 450
45
I'm thinking of a number. My number is a multiple of 10. What other numbers must my number be a multiple of?
1, 2, and 5
List all the factors of 90.
1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90
(25/5 xx 3 + 6) - 1
20
Challenge: A car uses 100 ml of petrol every 5 minutes. How many litres of petrol does the car use in an hour?
1.2 litres