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Grade 4 · Worksheet
Numbers and sequences
Square & triangular numbers
- 1.
What is the 5th square number?
- 2.
Which of these is a square number?
- A16
- B18
- C20
- D24
- 3.
Which of these is a triangular number?
- A10
- B12
- C14
- D16
- 4.
36 is a square number.
True False - 5.
What is the 1th square number?
- 6.
What is the 4th square number?
- 7.
What is the 7th square number?
- 8.
What is the 11th square number?
- 9.
The triangular numbers are 1, 3, 6, 10, … What is triangular number 3?
- 10.
The triangular numbers are 1, 3, 6, 10, … What is triangular number 5?
- 11.
The triangular numbers are 1, 3, 6, 10, … What is triangular number 8?
- 12.
The triangular numbers are 1, 3, 6, 10, … What is triangular number 10?
- 13.
In the number 71, what is the ones digit?
- 14.
In the number 30, what is the tens digit?
- 15.
What comes next? 31, 32, 33, 34, …
- 16.
What comes next? 28, 38, 48, 58, …
- 17.
What number comes just after 37?
- 18.
What number comes just before 70?
- 19.
What comes next? 17, 18, 19, 20, …
- 20.
Write this as a single number: 70 + 5
Answer key
Numbers and sequences — Square & triangular numbers
- 1.25
- 2.A. 16
- 3.A. 10
- 4.True
- 5.1
- 6.16
- 7.49
- 8.121
- 9.6
- 10.15
- 11.36
- 12.55
- 13.1
- 14.3
- 15.35
- 16.68
- 17.38
- 18.69
- 19.21
- 20.75