How is the error-review paper different from the first three?

It targets the four common slips: multiplying instead of dividing, minutes not converted to hours, forgetting the train length, and averaging speeds directly.

How do I stop repeating these mistakes?

Name what is asked, pick the matching formula, label the unit as hours or seconds, and sanity-check the size of the answer.

P6 Maths Speed, Distance and Time Paper 4: Error Review

2026-11-09

Tutor Prep Guide · P6 Maths

Ten original error-review items, each with an answer and a one-line explanation.

Direct answers　Items 1-3 revisit multiplying instead of dividing and unit slips, 4-6 cover average speed, minute conversion and wrong formulas, 7-9 tackle trains, catch-up and time units, and item 10 is the hours-and-minutes error. Cover the answers first, then check each note.

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: P6 Maths Speed, Distance and Time
Level	P6

02　Questions (10 items)

FoundationError review: a pupil says 180 km in 3 hours means 540 km/h. What is wrong and what is correct?
FoundationError review: 90 km in 2 h 15 min is worked as 2.15 h, giving 41.9 km/h. What is the correct speed?
FoundationError review: a pupil converts 20 m/s to 5.56 km/h. What is correct?
IntermediateError review: 40 km/h out and 60 km/h back on the same road is averaged as 50 km/h. What is correct?
IntermediateError review: 300 m in 4 minutes is answered as 75 m/s. What is the correct speed?
IntermediateError review: 80 km/h for 2.5 hours is worked as 32 km. What is the correct distance?
ChallengeError review: a 100 m train clears a 400 m bridge in 25 s and is answered as 16 m/s. What is correct?
ChallengeError review: with a 360 m lead and 15 m closed per minute, a pupil adds the speeds. How long to catch up?
ChallengeError review: 45 km/h for 40 minutes is answered as 1800 km. What is the correct distance?
Error redoError review: a pupil reads 1.5 hours as 1 h 5 min and gets 75 km at 60 km/h. What are the correct time and distance?

03　Answers and one-line notes

#	Answer	One-line note
1	It should be 60 km/h	The pupil multiplied; speed is distance over time, 180 / 3 = 60 km/h.
2	40 km/h	15 minutes is 0.25 h, so the time is 2.25 h and 90 / 2.25 = 40 km/h.
3	72 km/h	Multiply by 3.6: 20 x 3.6 = 72; dividing by 3.6 gives the wrong 5.56.
4	48 km/h	Equal distances but unequal times: 2 x 40 x 60 / (40 + 60) = 48, not 50.
5	1.25 m/s	The pupil used 4 seconds; 4 minutes is 240 s, so 300 / 240 = 1.25 m/s.
6	200 km	Distance is speed times time: 80 x 2.5 = 200 km, not 80 / 2.5.
7	20 m/s	Bridge plus train is 500 m, so 500 / 25 = 20 m/s; 16 m/s only covers the bridge.
8	24 minutes	Use the speed difference: 360 / 15 = 24 minutes; adding speeds gives the wrong 24/7.
9	30 km	40 minutes is 2/3 h, not 40 h, so 45 x 2/3 = 30 km.
10	1 h 30 min, 90 km	0.5 h is 30 minutes, so 1.5 h is 1 h 30 min and 60 x 1.5 = 90 km.

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.

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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.