Quiz on Algebraic Formulae

Which of the following represents a formula for area of a rectangle?

• A = l + w

• A = 2l + 2w

• A = l × w

• A = l ÷ w

Which situation best matches the formula: C = 2πr?

• Area of a circle

• Circumference of a circle

• Diameter of a circle

• Volume of a sphere

The formula to find speed is S = D/T. What is the subject of the formula?

• Speed

• Distance

• Time

• None

Change the subject of the formula: T = D/S

• D = ST

• S = TD

• S = T + D

• D = T/S

Make 'h' the subject: A = ½bh

• h = 2A/b

• h = b/2A

• h = A/b

• h = A × 2

What is the new subject in the equation: V = IR, make R the subject

• R = V + I

• R = V - I

• R = V/I

• R = I/V

If V = IR and I = 2A, R = 3Ω, what is V?

• 6V

• 5V

• 1.5V

• 0.66V

If A = ½bh, find A when b = 10 and h = 4

• 10

• 20

• 30

• 40

Given the formula S = ut + ½at², find S when u = 0, a = 4, t = 2

• 8

• 4

• 2

• 16

Make b the subject: A = ½bh

• b = 2A/h

• b = A/h

• b = h/2A

• b = A × h