Home › Certifications › 3rd Math: Measurement & Data
150 multiple-choice questions, 60 flashcards and 10 scenario simulations, written to the Common Core State Standards blueprint. Every question carries a full rationale.
Study 3rd Math: Measurement & Data in CoStudy →
Common Core State Standards (CCSS) — Mathematics, Grade 3: Measurement & Data (3.MD.A.1-2, 3.MD.B.3-4, 3.MD.C.5-7, 3.MD.D.8). Public standards from corestandards.org.
CoStudy's 3rd Math: Measurement & Data bank holds 220 items. Every multiple-choice question carries a written rationale explaining why the correct answer is correct and why each distractor is tempting but wrong, and the bank includes 10 scenario-based simulations.
A sample of 12 multiple-choice questions from the bank, with the full rationale shown.
Which unit measures water in a bottle?
Answer: A — Milliliters
A) Correct — volume. B) mass. C) length. D) time.
A line plot has Xs at 1/2, 1/2, 3/4, 1. How many total Xs?
Answer: B — 4
4 Xs total. (A),(C),(D) miscount.
An event starts at 3:00 pm and ends at 3:35 pm. How long?
Answer: D — 35 min
D) Correct. B) close but wrong. C) hours confusion. A) wrong.
School starts at 8:00 and ends at 11:30. How long is school?
Answer: B — 3 hr 30 min
8:00 → 11:30 = 3 hr 30 min. (A),(C),(D) wrong.
On a bar graph scale of 2, bars: A=5 spaces, B=3 spaces. How many total?
Answer: C — 16
C) Correct — (5×2)+(3×2)=10+6=16. B) sum of spaces. A) A only. D) B only.
A square with side 5 has area?
Answer: A — 25
A) Correct — 5². B) perimeter. C) 2×5. D) 3×5.
A room 10×8 ft. Area?
Answer: C — 80 sq ft
C) Correct. B) perim. A) semi. D) wrong.
A 3 by 8 rectangle. Area?
Answer: A — 24
A) Correct. B) sum. C) perim. D) wrong.
Which unit measures liquid volume?
Answer: B — Liter
Liter = liquid volume. (A) mass; (C) length; (D) time.
A show starts at 7:25 and runs 55 minutes. Ends at?
Answer: C — 8:20
C) Correct — 35 min to 8:00, +20 more = 8:20. B) only 30 min. A) 35 min. D) 1 hr.
A survey shows: chocolate 15, vanilla 10, strawberry 5. Total?
Answer: A — 30
A) Correct. B/C/D) miscount.
Convert 3000 g to kg.
Answer: A — 3 kg
A) Correct — 3000 ÷ 1000. B/C) wrong. D) too small.
6 sample cards from the 60 in the bank.
To carpet a room, do you need area or perimeter?
Area. (You need to know how much space the floor covers.)
What time is 'a quarter past 3'?
3:15.
A floor is 8 ft × 10 ft. What's the area in square feet?
80 sq ft.
How many minutes from 11:50 to 12:25?
35 minutes.
A field is 50 m × 30 m. What is its area?
1500 sq m. (50 × 30 = 1500.)
How many seconds in 1 minute?
60.
These samples are a small slice. The full bank runs flashcards, multiple choice and timed mock exams with per-chapter progress tracking, on the web and in the iOS app.
Open 3rd Math: Measurement & Data →
The 3rd Math: Measurement & Data bank holds 220 items: 150 multiple-choice questions, 60 flashcards and 10 scenario-based simulations. 18 of them are on this page to read free, with no signup.
Yes. Every multiple-choice item carries a written rationale that states the controlling principle behind the correct answer and then addresses each wrong option in turn — why it tempts and precisely where it fails. Knowing why the plausible answer was wrong is worth more than knowing which letter was right.
Common Core State Standards (CCSS) — Mathematics, Grade 3: Measurement & Data (3.MD.A.1-2, 3.MD.B.3-4, 3.MD.C.5-7, 3.MD.D.8). Public standards from corestandards.org.
The samples on this page are free to read in full, rationales included, with no account. The complete 220-item bank, the timed mock exams and per-chapter progress tracking are part of CoStudy on the web and in the iOS app.
Last reviewed 2026-08-22. Banks are written against the certifying body's published exam outline and re-checked when that outline changes — exams get renumbered, retired and reweighted, and a bank written to a superseded outline teaches the wrong proportions. Figures that are re-indexed annually are deliberately not asserted as rules; the questions test the governing principle instead.