Numbers + Percentages
Convert 0.25 to percentage
25%
Simplify 3x + 5x
8x
Gradient of the line
Y= 2x+1
2
How many degrees are in a straight angle?
180
Write the ratio 4 red marbles to 6 blue marbles in simplest form.
2:3
Find 20% of 80
16
Solve
x + 7= 15
8
y-intercept of
y= -3x + 4
4
Find the perimeter of a rectangle with length 8cm and width 5cm
26cm
A car travels 120 km in 2 hours. What is the average speed?
60 km/h
Increase 50 by 10%
55
Simplify
4(x + 3)
4x + 12
Write the rule for a line with gradient 5 and y intercept -2
Y= 5x -2
Find the area of a triangle with base 10cm and height 6cm
30cm2
Share $24 in the ratio 1 : 3. How much does the larger share get?
$18
A phone costs $600. It is discounted by 15%. How much is the discount?
$90
Solve
3x – 5=16
x =7
If y=2x +1
Find y when x=3
7
1 angle in an isosceles triangle is 40degrees. What are the other 2?
70 and 70
A recipe needs 2 cups of flour for 4 people. How many cups for 10 people?
5 cups
After a 20% discount, a jacket costs $72. What was the original price?
$90
Solve
2(x + 4)=18
x= 5
Line passes through (0,3) and (3,7). What is the gradient?
2
Line passes A right angled triangle has legs of 6cm and 8cm. Find the hypotenuse.
10cm
Movie tickets cost $12 each. Write a rule for the total cost (C) of x tickets.
C= 12x