Percentage
Increase £40 by 10%.
£44
What is the speed if you travel 40 miles in 2 hours?
20 mph
Round 6.4 to the nearest whole number.
6
Simplify: 3x + 2x
5x
Solve: x + 5 = 12
x = 7
Decrease £50 by 20%.
£40
Calculate density if mass = 50 g and volume = 10 cm³.
5 g/cm³
The number 37 is rounded to the nearest 10. Give the error interval.
35 ≤ x < 45
Expand: 4(2x + 3)
8x + 12
Solve: 3x = 21
x = 7
What percentage of 80 is 20?
25%
A car travels 150 miles at 50 mph. How long does it take?
3 hours
A measurement is 4.2 cm to 1 decimal place. State the lower bound.
4.15 cm
Factorise: x2 + 7x
x(x + 7)
Solve: 2x - 8 = 10
x = 9
A jumper is reduced from £30 to £24. What is the percentage decrease?
20%
A machine produces 240 items in 3 hours. What is the rate of production in items per minute?
1.33 items/min
A length is 8.7 cm to 1 dp. Find the upper bound.
What is 8.75 cm?
Expand: (x + 4)(x + 2)
x2 + 6x + 8
Solve: 5(x - 2) = 15
x = 5
A jacket is on sale for 30% off. After the discount is applied, the sale price is £42. What was the original price of the jacket?
£60
A metal block has density 8 g/cm³ and volume 12 cm³. Find its mass.
96 g
The speed of a train is 137 mph to 3sf. Give the error interval.
136.5 ≤ x < 137.5
Factorise completely: 3x2 - 12x
3x(x - 4)
Solve: 2x + 3 = 5x - 6
x = 3