Solve problems involving converting units in different contexts | Exit Quiz | Oak National Academy

Laura and her family are going on holiday. They are spending 2 weeks in Spain and 2 days in Portugal. How long are they on holiday for altogether, in days? (a)   days

Answer explanation

One week = seven days, so two weeks = 14 days. 14 days + 2 days = 16 days.

It’s the summer holidays for the children of Oak Academy. They have four weeks and three days off. How long do they have off altogether, in days? (a)   days.

Answer explanation

One week = seven days, so four weeks = 28 days. 28 days + 3 days = 31 days.

Laura and Andeep are competing against each other to beat a tricky level on Space Blasters. Laura clears it in exactly two hours and Andeep takes 115 minutes. Which of these statements is correct?

• Laura is quicker by 5 minutes.

• Andeep is quicker by 5 minutes.

• Laura is quicker by 113 minutes.

Answer explanation

One hour = 60 minutes so two hours = 120 minutes. This is 5 minutes slower than 115 minutes. Laura is therefore quicker than Andeep by 5 minutes.

Andeep lives 10 miles away from a theme park. Laura lives 20 km away from the theme park. How much further away does Laura live? (a)   km (5 miles is approximately 8 km)

Answer explanation

5 miles is approximate 8 kilometres, so 10 miles is approximately 16 kilometres, which is 4 kilometres less than 20 kilometres. Laura lives 4 km further away.

Laura’s mum has a 2 gallon petrol can which is full. She accidentally knocks it over. 7 litres spill out of it. How much petrol is left in the can? (a)   l (1 gallon is approximately 4.5 l)

Answer explanation

1 gallon is approximately 4.5 litres, so 2 gallons is approximately 9 litres, which is 2 litres more than 7 litres. There are 2 litres left in the can.

Laura’s mum has a 2 gallon petrol can. It is not full. It currently holds 5 litres. How much more petrol does it need to fill it? It needs (a)   l more to fill it. (1 gallon is approximately 4 l)

Answer explanation

1 gallon is approximately 4.5 litres, so 2 gallons is approximately 9 litres, which is 4 litres more than 5 litres. She needs 4 litres more to fill the can.