Are these textbook or past exam questions?

No. Every item is written by TutorZone and is not taken from any textbook, past paper or official marking scheme.

How should a child follow up on a wrong answer?

Read the one-line note, then redo a similar item to check tens and ones are separated correctly.

How is Paper 4 different from Papers 1 to 3?

Paper 4 reviews the commonest mistakes: writing 12 as 21 and confusing before, after and ordinal position.

P1 Maths Numbers to 20 Paper 4: Error Review

2026-11-09

Tutor Prep Guide · P1 Maths

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

Direct answers　Items 1-3 are basic, 4-6 intermediate and 7-9 challenge, with item 10 as the error review. Time yourself first, then check each answer and redo what is wrong.

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: P1 Maths: Numbers to 20
Level	P1

02　Questions (10 items)

FoundationHow many tens and ones make 14?
FoundationWhat number is 1 ten and 7 ones?
FoundationWhich is larger, 18 or 20?
IntermediateWhat comes just before and just after 13?
IntermediateCounting from 11 up to 20, how many numbers do you say?
IntermediateIs 16 odd or even?
Challenge10 + 6 = ?
Challenge19 − 1 = ?
ChallengeTwelve pupils queue up and Ming is 5th. How many are ahead of him?
Error redoReview: a pupil writes 21 for “twelve”. What is correct?

03　Answers and one-line notes

#	Answer	One-line note
1	1 ten and 4 ones	The tens digit is 1 and the ones digit is 4.
2	17	Write 1 in the tens place and 7 in the ones place.
3	20	20 has 2 tens while 18 has only 1 ten.
4	12 and 14	Count back one for 12 and forward one for 14.
5	10	From 11 to 20 inclusive there are 10 numbers.
6	Even	16 pairs up completely, so it is even.
7	16	Adding 6 to 10 keeps the ten and makes the ones 6, so 16.
8	18	One before 19 is 18.
9	4	Being 5th means 4 people are in front.
10	12	Twelve is 1 ten and 2 ones, written 12; 21 would be twenty-one.

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.