P5 Maths: Mean (Basics) (Paper 1 (basics))

2026-11-15

Tutor Prep Guide · Using the mean as total over count in all three directions, rebuilding totals and missing items, changes after adding or removing data, combining groups, weighted means and diagnosing common slips

Paper 1 (basics): ten mean questions on computing the mean, rebuilding totals and combining groups, with answers and one-line notes.

Direct answers　Level: P5 maths; format: computing the mean, rebuilding totals and missing items, adding or removing data, combining groups and weighted means.

01　Paper details (check answers afterwards)

Item	Detail
Questions	10
Suggested time	20
Difficulty mix	Foundation 3 · Intermediate 3 · Challenge 3 · Error redo 1
Chapter	Chapter: P5 Maths: Mean (Basics)
Level	P5

02　Questions (10 items)

FoundationFind the mean of 4, 6 and 8.
FoundationTest scores are 80, 85, 90, 75 and 70; find the mean score.
FoundationSix numbers have a total of 42; find the mean.
IntermediateFind the mean of 12, 15, 18 and 19.
IntermediateA runner covers 2, 3, 2, 4, 3, 5 and 2 km in seven days; find the daily mean.
IntermediateFive numbers have a mean of 9; find their total.
ChallengeEight numbers have a total of 96; find the mean.
ChallengeThree numbers have a mean of 15 and two of them are 12 and 16; find the third.
ChallengeFour students are 148, 152, 150 and 150 cm tall; find the mean height.
Error redoError clinic: for the five numbers 10, 10, 20, 20 and 40 a student added only 10 and 20 and divided by 2. Find the correct mean.

03　Answers and one-line notes

#	Answer	One-line note
1	6	The sum 18 divided by 3 gives 6.
2	80 marks	The total 400 divided by 5 gives 80.
3	7	The mean is the total divided by the count, so 42 over 6 gives 7.
4	16	The sum 64 divided by 4 gives 16.
5	3 km	The total 21 km divided by 7 gives 3 km.
6	45	The total is the mean times the count, so 9 times 5 gives 45.
7	12	96 divided by 8 gives 12.
8	17	The total 45 minus 28 leaves 17.
9	150 cm	The total 600 divided by 4 gives 150 cm.
10	20	The mean must use the total of all five numbers, 100, divided by 5.

04　What to do after marking

After marking, redo only the wrong items and write down which step went wrong (formula, unit, or misread number).
Repeat the same item two days later; move to the next paper only when both attempts are correct.
Parents only need the answer and note columns; there is no need to explain every item.

Check the answers, and for any wrong item write down the total and the count first, then compute the mean again.Tutor Registration →

Questions and answers are written originally by the TutorZone team and are not taken from any school, publisher or examination authority paper. Every value is checked by computer.