How do I tell the tens digit from the ones digit?

From the right, the first digit is the ones and the second is the tens, so 68 has tens digit 6.

How do I compare two two-digit numbers?

Compare the tens digits first, and only compare the ones when the tens are equal.

What is the usual trap when counting to 100?

After a 9 you must carry: after 79 comes 80, with the ones becoming 0 and the tens going up by 1.

P1 Maths Numbers to 100 Paper 3: Challenge

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	25
Difficulty mix	Foundation 3 · Intermediate 3 · Challenge 3 · Error redo 1
Chapter	Chapter: P1 Maths Numbers to 100
Level	P1

02　Questions (10 items)

FoundationWhat is 8 tens?
FoundationWhat is the ones digit of 46?
FoundationCounting from 30 to 33 inclusive, how many numbers do you say?
IntermediateFrom 1 to 100 inclusive, how many numbers have ones digit 0?
IntermediateFrom 1 to 100 inclusive, how many numbers have tens digit 7?
IntermediateUsing the digit cards 3, 0 and 6 once each, what is the smallest three-digit number? The first digit cannot be 0.
ChallengeA two-digit number has 8 in both the tens and the ones place. What is the number?
ChallengeWhat is the difference between 46 and 31?
ChallengeStart at 100 and subtract 10 four times. What number do you reach?
Error redoError review: a pupil says there is one more even number than odd numbers from 1 to 100 because 0 is even. Is that right?

03　Answers and one-line notes

#	Answer	One-line note
1	80	Each ten is 10, so 8 × 10 = 80.
2	6	In 46 the tens digit is 4 and the ones digit is 6.
3	4	They are 30, 31, 32 and 33, so 4 numbers: 33 − 30 + 1.
4	10	They are 10, 20, 30 up to 100, one in every ten, so 10 in total.
5	10	Every number from 70 to 79 has tens digit 7, so 10 numbers.
6	306	The first digit must be the smallest non-zero card, 3; then 0 in the tens place and 6 in the ones gives 306.
7	64	8 tens make 80, and 8 more ones give 64.
8	15	46 − 31 = 15, and 31 + 15 = 46 checks it.
9	60	The steps are 90, 80, 70 and 60, so after four subtractions you reach 60.
10	No: there are 50 even and 50 odd numbers	From 1 to 100 there are 100 numbers alternating odd and even, so 100 ÷ 2 = 50 of each; 0 is not in the list.

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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