Revision of formulae

Which is the correct formula for area of a rectangle?

• Length x 4

• Length x width

• L+L+H+H

Answer explanation

Also could say Length x height

And remember area is always units squared!

If a shop buys a top for 10 euro but sells it for 15 euro, calculate the percentage profit.

• 33.3%

• 66%

• 50%

• 25%

Answer explanation

If it takes a car 1 hour and 30 minutes to drive 75km, what was the average speed?

• 50km

• 50km/hr

• 75km/h

• 37.5

Answer explanation

Speed is distance divided by time.

Remember to change 1 hour and 30 mins to 1.5 hours as speed is given in km per hour.

How do you calculate distance?

• Speed x time

Answer explanation

Remember the SDT triangle

Find the mean of the following numbers

2, 4, 4 , 7 , 9

• 4

• 5.2

• 7

• 9

Answer explanation

For the mean we add and divide by how many numbers there are.

Find the median of the following data

2, 4, 4 , 7 , 9

• 4

• 7

• 5

• 2

Answer explanation

median is the middle number

Find the mode of the following data

2, 4, 4 , 7 , 7, 7 , 9

• 4

• 7

• 4 and 7

• 5

Answer explanation

mode the most popular

sin x =

• opp/adj

• hyp/opp

• adj/hyp

• opp/hyp

Answer explanation

volume of a cubed with sides l=3cm, h=5cm, w=8cm

Answer explanation

volume = l(h)(w)