What is?
What is a factor?
A number that divides exactly into another number.
What is the perimeter of a shape?
The distance around the outside.
Simplify: 3x + 2x
5x
I am thinking of a number. I add 5 and get 12. What is my number?
7
Every prime number is odd.
False — 2 is prime and even.
What is a multiple?
The result of multiplying a number by an integer.
What is the area of a shape?
The amount of space inside a shape.
Expand: 3(x + 4)
3x + 12
I am an even number between 20 and 30. My digits add to 6. What am I?
24
If a number is divisible by 6, it must be divisible by both 2 and 3.
True :)
What is a prime number?
A number with exactly two factors: 1 and itself.
What is the volume of a shape?
The amount of space it occupies.
What is 2(x + 3) when x = 4?
14
A number is multiplied by 3, then 4 is added. The answer is 19. What was the number?
5
π (pi) is a rational number because it can be written as a fraction.
False, it's an infinite number, so irrational.
What is a cube number? Give two examples of cube numbers.
A number multiplied by itself three times. 1 and 8.
A rectangle has a length of 8 cm and a width of 5 cm. What is its area, perimeter and volume?
Area = 40cm2, perimeter 26cm, volume = no volume!
Solve: 2x + 5 = 17
x = 6
I am thinking of a number. Half of me is 18. What number am I?
36
If two shapes have the same perimeter, they must have the same area.
False
What is BIDMAS used for?
The order of operations.
A triangle has angles of 65° and 45°. What is the size of the third angle?
70°
Solve: 3(x + 2) = 2x + 9
x = 3
I am a two-digit number. My digits add to 9. My tens digit is twice my units digit. What number am I?
63
Increasing a number by 20% and then decreasing it by 20% returns it to its original value.
False