Estimation & Approximation Challenge
Test your Year 6 skills in estimating and approximating numbers and quantities.
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Quiz Questions & Answers
Review every prompt, the correct responses, and helpful context to prep for your own run-through.
Question 1: What is the best estimate for the number of jelly beans in a jar if you see about 20 on the bottom layer and the jar is 10 layers high?
200 jelly beans
50 jelly beans
20 jelly beans
1000 jelly beans
Question 2: When might you use estimation in real life?
Counting the exact number of students in a small class
Measuring the precise length of a piece of wood for a perfect fit
Calculating how much money you need for groceries
Finding the exact time on a digital clock
Question 3: Round the number 4,782 to the nearest hundred.
4,800
5,000
4,700
4,780
Question 4: Which of these situations requires an exact answer, not an approximation?
The distance you can walk in an hour
The time it takes to travel a long distance by car
The amount of ingredients for a baking recipe
The number of people at a large concert
Question 5: Estimate the total cost of 3 items if each item costs approximately £4.95.
£15
£12
£10
£20
Question 6: Rounding 1,234,567 to the nearest million gives which number?
2,000,000
1,200,000
1,235,000
1,000,000
Question 7: Why is approximation useful in everyday life?
It is only used by mathematicians
It removes the need for any mathematical calculations
It always provides the most accurate answer
It helps to quickly get an idea of a quantity without needing exact figures
Question 8: A school hall has rows of chairs. If there are 15 rows with about 22 chairs in each, what is the best estimate for the total number of chairs?
300 chairs
330 chairs
400 chairs
200 chairs
Question 9: What does it mean to approximate a number?
To calculate the exact value of a number
To find a value that is close to the actual value, but not exactly the same
To divide a number by 2
To multiply a number by 10
Question 10: If a journey is 187 miles long, and you want to tell someone roughly how far it is, what would be the most appropriate approximation?
About 180 miles
About 200 miles
About 190 miles
About 100 miles