Functional maths revision

fractions and percentages

1

What is 50% of £630?

£315

2

A car costs £12 600. There is 1/3 off. How much money will you save?

£4200

3

Hamish managed to complete 3/4 of a 10k race. How many metres had he run before he gave up?

7 500m

4

An advert claims that over 80% of people who use Whamo washing powder prefer it to other brands. In a survey of 125 people, 105 agreed that they did. Is the advert correct? Explain your answer.

Yes, 21/25. or 80% of 125 is 100.

5

In the end of year test, you need 65% to pass. I scored 26/40. Anuja scored 3/5 of the available marks. Igor missed out 1/4 of the questions but got the rest right. Beth missed out 1/4 of the questions and got 10% of the rest wrong. Who passed?

Me: 26/40 = 65%, pass

Anuja: 3/5 of 40 = 24 marks, fail

Igor: 1/4 missed = 3/4 done = 75% pass

Beth: 1/4 missed = 30 questions done. 10% of 30 = 3. 27 pass

measurement

1

How many centimetres are there in one metre?

100

2

How many metres are there in 1.5 km?

1500

3

Lucy has 447.5 ml of white wine. Jack has 1/2 litre of red wine. Who has the most?

Jack.

4

A room is 3.5m by 4.2 m. I need to put skirting board around it. I have 2000 cm of skirting board. Do I have enough?

yes

5

I have a cube shaped box with edges of 10cm. I am going to cover the box with small mosaic tiles. Each tile is 1 cm² . The tiles cost £5.99 for a pack of 50. How much will it cost?

£71.88

ratio & scale

1

On a scale drawing question, I am told that 1 square equals 50 cm. How many squares do I need to represent 1m?

2

2

Jack is mixing purple paint using red and blue in the ratio 1:2. If he uses 3 tins of red paint, how many tins of blue paint does he need?

6 tins

3

I work in a garden centre and need to mix up some plant food. I have 12 litres of water in my watering can. The bottle says use 50 ml of plant food : 3 litres of water. How much plant food should I put in?

200 ml

4

I have a recipe for spaghetti bolognaise which uses 2.5 Kg of mince. The recipe serves 15 people. Unfortunately, I only have 2 friends. If I make the recipe for our dinner, how much mince should I use?

0.5 kg / 500 g

5

I have two children: Tom, aged 8 and Amy, aged 12. Their granny has given me £100 to give them and told me to split it to reflect their different ages. How much should I give each of them?

£40 for Tom £60 for Amy.

The four rules

1

What is the sum of 4326 and 224

4550

2

What is the difference between 995.6 and 327.2

668.4

3

what is 352 x 9

3168

4

Work out 968 divided by 4

242

5

Complete this sum 155 x  ? - 90 = 375

3

Lucky Dip

1

How many grams are there in 3 kg?

3 000

2

How many weeks are there in a year?

52

3

How many days are there in 7t years? (no leap years)

1095

4

If it's 5:15 p.m. now. What time was it 150 minutes ago?

2:45 p.m.

5

What is the volume of a cuboid that is 2.2m x 3.1m x 800cm?

54.56m³