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Primary 2 Mathematics Numbers Quiz
Free P2 Maths Numbers quiz, Kimi2.6 AI version, with questions, answers, and syllabus-aligned practice for Singapore students.
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Primary 2 Mathematics Quiz - Numbers: Answer Key
Total Marks: 40
Section A: Choose the correct answer. (2 marks each)
1. What is the value of the digit 6 in 682?
Answer: C) 600
Explanation: In a 3-digit number, each digit has a place value. The rightmost digit is the ones place, the middle digit is the tens place, and the leftmost digit is the hundreds place. In 682, the 6 is in the hundreds place. The value of a digit means what that digit is actually worth in that position. So 6 in the hundreds place means 6 × 100 = 600. Be careful not to confuse "digit" (just the symbol 6) with "value" (what it represents).
Marking: 2 marks for correct answer.
2. Which number is the smallest?
Answer: D) 348
Explanation: To compare numbers, always start with the hundreds place first (the leftmost digit).
- 438 has 4 hundreds
- 483 has 4 hundreds
- 384 has 3 hundreds
- 348 has 3 hundreds
Since 3 < 4, we only need to compare 384 and 348. Both have 3 hundreds, so look at the tens place: 384 has 8 tens (80) but 348 has 4 tens (40). Since 40 < 80, we have 348 < 384.
Marking: 2 marks for correct answer.
3. 475 is _______ more than 425.
Answer: C) 50
Explanation: "How many more" means we need to find the difference between the two numbers. Subtract the smaller from the larger: 475 − 425 = 50. You can also count up: from 425 to 475 is +50. This checks our understanding of subtraction as comparison.
Marking: 2 marks for correct answer.
4. What is the missing number in the pattern?
Answer: B) 395
Explanation: First find the pattern rule by looking at the gap between consecutive numbers: 295 − 245 = 50, and 345 − 295 = 50. The rule is add 50 each time. So 345 + 50 = 395. Check: 395 + 50 = 445 ✓
Marking: 2 marks for correct answer.
5. Which of the following is an odd number?
Answer: C) 581
Explanation: Even numbers end in 0, 2, 4, 6, or 8 and can be divided into two equal groups with nothing left over. Odd numbers end in 1, 3, 5, 7, or 9 and cannot be divided into two equal groups. Check the ones digit:
- 328 ends in 8 → even
- 456 ends in 6 → even
- 581 ends in 1 → odd
- 694 ends in 4 → even
Marking: 2 marks for correct answer.
6. The number 704 written in words is
Answer: B) seven hundred and four
Explanation: When writing numbers in words:
- 704 has 7 hundreds, 0 tens, and 4 ones
- We say "seven hundred" for the hundreds
- Since there are no tens, we skip that part (don't say "zero tens" or "and zero")
- We say "and four" for the ones
- In Singapore style, we include "and" before the tens/ones part
Note: "seven hundred and forty" would be 740, and "seventy-four" is 74.
Marking: 2 marks for correct answer.
7. 800 + 30 + 7 = _______
Answer: A) 837
Explanation: This is expanded form, showing the value of each digit. 800 means 8 in the hundreds place, 30 means 3 in the tens place, and 7 means 7 in the ones place. Putting it together: 8 hundreds, 3 tens, 7 ones = 837.
Marking: 2 marks for correct answer.
8. Which number sentence is correct?
Answer: D) 645 < 654
Explanation: Check each one by comparing hundreds first, then tens, then ones:
- A) 567 > 576? Both have 5 hundreds. Compare tens: 6 < 7, so 567 < 576. False.
- B) 432 < 423? Both have 4 hundreds. Compare tens: 3 > 2, so 432 > 423. False.
- C) 891 = 981? 8 hundreds ≠ 9 hundreds. False.
- D) 645 < 654? Both have 6 hundreds. Compare tens: 4 < 5, so 645 < 654. True.
Marking: 2 marks for correct answer.
Section B: Fill in the blanks. (2 marks each)
9. In 936, the digit _______ is in the hundreds place.
Answer: 9
Explanation: Place value positions from right to left are: ones, tens, hundreds. In 936:
- 6 is in the ones place
- 3 is in the tens place
- 9 is in the hundreds place
The digit in the hundreds place represents how many hundreds there are: 9 × 100 = 900.
Marking: 2 marks for correct answer. Accept "9" or "nine."
10. Write 5 hundreds, 7 tens and 2 ones as a number.
Answer: 572
Explanation:
- 5 hundreds = 500
- 7 tens = 70
- 2 ones = 2
- Total: 500 + 70 + 2 = 572
This connects the place value language to the standard numeral form.
Marking: 2 marks for correct answer.
11. Arrange the numbers from smallest to biggest: 528, 285, 852, 258
Answer: 258, 285, 528, 852
Explanation: Compare hundreds first:
- 258 and 285 both have 2 hundreds (smaller group)
- 528 has 5 hundreds
- 852 has 8 hundreds (biggest)
Within the 2 hundreds group, compare tens: 258 has 5 tens (50), 285 has 8 tens (80). So 258 < 285.
Final order: 258, 285, 528, 852
Marking: 2 marks for fully correct order. Deduct 1 mark if order reversed (biggest to smallest by mistake).
12. The number that is 100 less than 800 is _______.
Answer: 700
Explanation: "100 less than" means subtract 100: 800 − 100 = 700. Alternatively, since 800 is 8 hundreds, removing 1 hundred leaves 7 hundreds = 700. This tests mental calculation with hundreds.
Marking: 2 marks for correct answer.
13. 650, 700, 750, _______, 850
Answer: 800
Explanation: Find the pattern: 700 − 650 = 50, and 750 − 700 = 50. The rule is add 50. So 750 + 50 = 800. Check: 800 + 50 = 850 ✓
This is skip counting by 50s, building fluency with number patterns.
Marking: 2 marks for correct answer.
14. 988, 978, 968, _______, 948
Answer: 958
Explanation: Find the pattern: 988 − 978 = 10, and 978 − 968 = 10. The rule is subtract 10 (or count backwards by 10s). So 968 − 10 = 958. Check: 958 − 10 = 948 ✓
This is counting backwards in tens, which is important for mental subtraction.
Marking: 2 marks for correct answer.
Section C: Show your working. (4 marks each)
15. (a) Greatest 3-digit number using 4, 7, 2
Answer: 742
Working:
- To make the greatest number, put the largest digit in the highest place value position.
- Digits in order from largest to smallest: 7, 4, 2
- Put 7 in hundreds place, 4 in tens place, 2 in ones place: 742
(b) Smallest 3-digit number using 4, 7, 2
Answer: 247
Working:
- To make the smallest number, put the smallest digit in the highest place value position.
- Digits in order from smallest to largest: 2, 4, 7
- Put 2 in hundreds place, 4 in tens place, 7 in ones place: 247
Marking: 2 marks each part. Award 1 mark for correct digits but wrong arrangement (e.g., 724 for greatest).
Common mistake: Students might put the smallest digit in the ones place for the greatest number, making 247 instead of 742. Emphasize: highest place value gets priority.
16. Maria has 245 stickers. Her brother has 178 more stickers than Maria.
(a) Brother's stickers
Answer: 423 stickers
Working:
- "178 more than Maria" means we add: 245 + 178
- Step 1: 245 + 100 = 345
- Step 2: 345 + 70 = 415
- Step 3: 415 + 8 = 423
Or using standard algorithm:
245
+ 178
-----
423
(5+8=13, write 3 carry 1; 4+7+1=12, write 2 carry 1; 2+1+1=4)
(b) Stickers altogether
Answer: 668 stickers
Working:
- "Altogether" means add Maria's and brother's stickers: 245 + 423
- Step 1: 200 + 400 = 600
- Step 2: 40 + 20 = 60
- Step 3: 5 + 3 = 8
- Total: 600 + 60 + 8 = 668
Or standard algorithm:
245
+ 423
-----
668
Marking: 2 marks each part. Award 1 method mark if correct working but wrong final answer due to calculation error; 0 marks if wrong method. Require unit "stickers" for full marks.
17. Biscuit sales: Monday 156, Tuesday 89 more than Monday, Wednesday 47 fewer than Tuesday.
(a) Tuesday's sales
Answer: 245 packets
Working:
- "89 more than Monday": 156 + 89
- 156 + 80 = 236
- 236 + 9 = 245
Or:
156
+ 89
-----
245
(b) Wednesday's sales
Answer: 198 packets
Working:
- "47 fewer than Tuesday": 245 − 47
- 245 − 40 = 205
- 205 − 7 = 198
Or:
245
- 47
-----
198
(5−7 need to borrow: 15−7=8; 3−4 need to borrow: 13−4=9; 1−0=1)
Marking: 2 marks each part. 1 method mark available. Require "packets."
Common mistake: In (b), students might add 47 instead of subtracting. Watch for "fewer than" = subtraction.
18. 560 books total, 278 storybooks.
(a) Science books
Answer: 282 science books
Working:
- "The rest are science books" means subtract: 560 − 278
- 560 − 200 = 360
- 360 − 70 = 290
- 290 − 8 = 282
Or standard algorithm with borrowing:
560
- 278
-----
282
(b) Science books after buying 125 more
Answer: 407 science books
Working:
- Add the new books: 282 + 125
- 282 + 100 = 382
- 382 + 20 = 402
- 402 + 5 = 407
Or:
282
+ 125
-----
407
Marking: 2 marks each part. 1 method mark available. Require "science books."
19. Place value chart with base-ten blocks
(a) Number shown
Answer: 537
Explanation: The image shows 3 flats (hundreds blocks) = 300, 5 rods (tens) = 50, and 7 unit cubes (ones) = 7. Total: 300 + 50 + 7 = 537.
(b) Value of digit in tens place
Answer: 50 (or "5 tens")
Explanation: In 537, the digit 5 is in the tens place. The value is 5 × 10 = 50. Do not accept just "5" — that would be the digit, not its value.
(c) Add 2 more hundreds blocks
Answer: 737
Working:
- Original: 537 (5 hundreds, 3 tens, 7 ones — wait, let me recheck: 3 hundreds, 5 tens, 7 ones = 537)
- Actually re-reading: 3 hundreds + 2 hundreds = 5 hundreds
- New number: 500 + 50 + 7 = 737
Or: 537 + 200 = 737
Marking: (a) 1 mark, (b) 1 mark, (c) 2 marks (1 for method, 1 for answer).
Note on image: Expected image shows 3 flat squares (hundreds), 5 long rods (tens), 7 small cubes (ones), clearly labeled with place value columns.
20. Number pattern: 175, 200, 225, _______, _______, 300, _______
(a) Missing numbers
Answer: 250, 275, 325
Working:
- Find the pattern: 200 − 175 = 25, and 225 − 200 = 25
- Rule: add 25 each time
- 225 + 25 = 250
- 250 + 25 = 275
- 300 + 25 = 325
(b) The rule
Answer: Add 25 to get the next number (or "count on in 25s" or "the pattern increases by 25 each time")
(c) Is 375 in this pattern?
Answer: Yes, 375 is in this pattern.
Explanation: Continue the pattern from 325: 325 + 25 = 350, 350 + 25 = 375. Since we keep adding 25 and reach 375 exactly, it is in the pattern. Alternatively: (375 − 175) = 200, and 200 ÷ 25 = 8, which is a whole number, so 375 is the 9th term.
Common wrong answer: "No" — students might stop at 325 and not continue, or think 300 is the end.
Marking: (a) 2 marks (deduct 1 for each error, minimum 0), (b) 1 mark, (c) 1 mark. For (c), must explain clearly to get the mark — answer only "yes" or "no" gets 0.
END OF ANSWER KEY