UST Elementary Daily Math Challenge
Week 3 — Visual & Spatial Thinking
August 31–September 6, 2026
50 Problems • Grades 3–5 Focus
A little math every day. A little stronger every week.
Weekly Format
每天完成一小部分；周末完成 Challenge
2
Monday: Questions 1–10
Tuesday: Questions 11–20
Wednesday: Questions 21–30
Thursday: Questions 31–40
Friday / Weekend: Questions 41–50 + Challenge
Goal: Think first, calculate second, and explain your reasoning.
Daily Practice
Questions 1–5
3
1. A square has side length 3. What is its perimeter? A) 5 B) 6 C) 12 D) 9
2. A square has side length 4. What is its perimeter? A) 6 B) 8 C) 16 D) 16
3. A square has side length 5. What is its perimeter? A) 7 B) 10 C) 20 D) 25
4. A square has side length 6. What is its perimeter? A) 8 B) 12 C) 24 D) 36
5. A square has side length 2. What is its perimeter? A) 4 B) 4 C) 8 D) 4
Daily Practice
Questions 6–10
4
6. A square has side length 3. What is its perimeter? A) 5 B) 6 C) 12 D) 9
7. A square has side length 4. What is its perimeter? A) 6 B) 8 C) 16 D) 16
8. A square has side length 5. What is its perimeter? A) 7 B) 10 C) 20 D) 25
9. A square has side length 6. What is its perimeter? A) 8 B) 12 C) 24 D) 36
10. A square has side length 2. What is its perimeter? A) 4 B) 4 C) 8 D) 4
Daily Practice
Questions 11–15
5
11. A square has side length 3. What is its perimeter? A) 5 B) 6 C) 12 D) 9
12. A square has side length 4. What is its perimeter? A) 6 B) 8 C) 16 D) 16
13. A square has side length 5. What is its perimeter? A) 7 B) 10 C) 20 D) 25
14. A square has side length 6. What is its perimeter? A) 8 B) 12 C) 24 D) 36
15. A square has side length 2. What is its perimeter? A) 4 B) 4 C) 8 D) 4
Daily Practice
Questions 16–20
6
16. A rectangle is 6 units long and 8 units wide. Its area is ___.
17. A rectangle is 7 units long and 9 units wide. Its area is ___.
18. A rectangle is 2 units long and 4 units wide. Its area is ___.
19. A rectangle is 3 units long and 5 units wide. Its area is ___.
20. A rectangle is 4 units long and 6 units wide. Its area is ___.
Daily Practice
Questions 21–25
7
21. A rectangle is 5 units long and 7 units wide. Its area is ___.
22. A rectangle is 6 units long and 8 units wide. Its area is ___.
23. A rectangle is 7 units long and 9 units wide. Its area is ___.
24. A rectangle is 2 units long and 4 units wide. Its area is ___.
25. A rectangle is 3 units long and 5 units wide. Its area is ___.
Daily Practice
Questions 26–30
8
26. A rectangle is 4 units long and 6 units wide. Its area is ___.
27. A rectangle is 5 units long and 7 units wide. Its area is ___.
28. A rectangle is 6 units long and 8 units wide. Its area is ___.
29. A rectangle is 7 units long and 9 units wide. Its area is ___.
30. A rectangle is 2 units long and 4 units wide. Its area is ___.
Daily Practice
Questions 31–35
9
31. A robot faces north, turns right, then turns right again. Which direction is it facing?
32. A robot faces north, turns right, then turns right again. Which direction is it facing?
33. A robot faces north, turns right, then turns right again. Which direction is it facing?
34. A robot faces north, turns right, then turns right again. Which direction is it facing?
35. A robot faces north, turns right, then turns right again. Which direction is it facing?
Daily Practice
Questions 36–40
10
36. A robot faces north, turns right, then turns right again. Which direction is it facing?
37. A robot faces north, turns right, then turns right again. Which direction is it facing?
38. A robot faces north, turns right, then turns right again. Which direction is it facing?
39. A robot faces north, turns right, then turns right again. Which direction is it facing?
40. A robot faces north, turns right, then turns right again. Which direction is it facing?
Daily Practice
Questions 41–45
11
41. A robot faces north, turns right, then turns right again. Which direction is it facing?
42. A robot faces north, turns right, then turns right again. Which direction is it facing?
43. A robot faces north, turns right, then turns right again. Which direction is it facing?
44. A robot faces north, turns right, then turns right again. Which direction is it facing?
45. A robot faces north, turns right, then turns right again. Which direction is it facing?
Weekly Challenge
Questions 46–50
12
46. Challenge: A 3 by 4 rectangle is made of unit squares. How many unit squares are inside?
47. Challenge: A 4 by 5 rectangle is made of unit squares. How many unit squares are inside?
48. Challenge: A 5 by 6 rectangle is made of unit squares. How many unit squares are inside?
49. Challenge: A 6 by 7 rectangle is made of unit squares. How many unit squares are inside?
50. Challenge: A 7 by 8 rectangle is made of unit squares. How many unit squares are inside?
Answer Key — Questions 1–5
Answer + How to Solve
13
1. Answer: C
How to solve: A square has 4 equal sides, so perimeter = 4 × side length.
2. Answer: C
How to solve: A square has 4 equal sides, so perimeter = 4 × side length.
3. Answer: C
How to solve: A square has 4 equal sides, so perimeter = 4 × side length.
4. Answer: C
How to solve: A square has 4 equal sides, so perimeter = 4 × side length.
5. Answer: C
How to solve: A square has 4 equal sides, so perimeter = 4 × side length.
Answer Key — Questions 6–10
Answer + How to Solve
14
6. Answer: C
How to solve: A square has 4 equal sides, so perimeter = 4 × side length.
7. Answer: C
How to solve: A square has 4 equal sides, so perimeter = 4 × side length.
8. Answer: C
How to solve: A square has 4 equal sides, so perimeter = 4 × side length.
9. Answer: C
How to solve: A square has 4 equal sides, so perimeter = 4 × side length.
10. Answer: C
How to solve: A square has 4 equal sides, so perimeter = 4 × side length.
Answer Key — Questions 11–15
Answer + How to Solve
15
11. Answer: C
How to solve: A square has 4 equal sides, so perimeter = 4 × side length.
12. Answer: C
How to solve: A square has 4 equal sides, so perimeter = 4 × side length.
13. Answer: C
How to solve: A square has 4 equal sides, so perimeter = 4 × side length.
14. Answer: C
How to solve: A square has 4 equal sides, so perimeter = 4 × side length.
15. Answer: C
How to solve: A square has 4 equal sides, so perimeter = 4 × side length.
Answer Key — Questions 16–20
Answer + How to Solve
16
16. Answer: 48
How to solve: Area of a rectangle = length × width.
17. Answer: 63
How to solve: Area of a rectangle = length × width.
18. Answer: 8
How to solve: Area of a rectangle = length × width.
19. Answer: 15
How to solve: Area of a rectangle = length × width.
20. Answer: 24
How to solve: Area of a rectangle = length × width.
Answer Key — Questions 21–25
Answer + How to Solve
17
21. Answer: 35
How to solve: Area of a rectangle = length × width.
22. Answer: 48
How to solve: Area of a rectangle = length × width.
23. Answer: 63
How to solve: Area of a rectangle = length × width.
24. Answer: 8
How to solve: Area of a rectangle = length × width.
25. Answer: 15
How to solve: Area of a rectangle = length × width.
Answer Key — Questions 26–30
Answer + How to Solve
18
26. Answer: 24
How to solve: Area of a rectangle = length × width.
27. Answer: 35
How to solve: Area of a rectangle = length × width.
28. Answer: 48
How to solve: Area of a rectangle = length × width.
29. Answer: 63
How to solve: Area of a rectangle = length × width.
30. Answer: 8
How to solve: Area of a rectangle = length × width.
Answer Key — Questions 31–35
Answer + How to Solve
19
31. Answer: South
How to solve: North → right is east → right again is south.
32. Answer: South
How to solve: North → right is east → right again is south.
33. Answer: South
How to solve: North → right is east → right again is south.
34. Answer: South
How to solve: North → right is east → right again is south.
35. Answer: South
How to solve: North → right is east → right again is south.
Answer Key — Questions 36–40
Answer + How to Solve
20
36. Answer: South
How to solve: North → right is east → right again is south.
37. Answer: South
How to solve: North → right is east → right again is south.
38. Answer: South
How to solve: North → right is east → right again is south.
39. Answer: South
How to solve: North → right is east → right again is south.
40. Answer: South
How to solve: North → right is east → right again is south.
Answer Key — Questions 41–45
Answer + How to Solve
21
41. Answer: South
How to solve: North → right is east → right again is south.
42. Answer: South
How to solve: North → right is east → right again is south.
43. Answer: South
How to solve: North → right is east → right again is south.
44. Answer: South
How to solve: North → right is east → right again is south.
45. Answer: South
How to solve: North → right is east → right again is south.
Answer Key — Questions 46–50
Answer + How to Solve
22
46. Answer: 12
How to solve: Count rows × columns; this is the rectangle's area.
47. Answer: 20
How to solve: Count rows × columns; this is the rectangle's area.
48. Answer: 30
How to solve: Count rows × columns; this is the rectangle's area.
49. Answer: 42
How to solve: Count rows × columns; this is the rectangle's area.
50. Answer: 56
How to solve: Count rows × columns; this is the rectangle's area.
Week Complete!
Think • Reason • Solve • Explain