Square and triangular numbers
Name: _____________________ Date: __________
Show your thinking with numbers, words, or a drawing.
1. How many dots are in this square pattern? That is the square number it shows.
2. How many dots are in this square pattern? That is the square number it shows.
3. How many dots are in this square pattern? That is the square number it shows.
4. How many dots are in this square pattern? That is the square number it shows.
5. How many dots are in this square pattern? That is the square number it shows.
Answer key · Square and triangular numbers
1. 49
The pattern has 7 rows with 7 dots in each row.
7 × 7 = 49, so it shows the square number 49.
2. 64
The pattern has 8 rows with 8 dots in each row.
8 × 8 = 64, so it shows the square number 64.
3. 25
The pattern has 5 rows with 5 dots in each row.
5 × 5 = 25, so it shows the square number 25.
4. 9
The pattern has 3 rows with 3 dots in each row.
3 × 3 = 9, so it shows the square number 9.
5. 36
The pattern has 6 rows with 6 dots in each row.
6 × 6 = 36, so it shows the square number 36.
Try it together
Choose a question from the printable. Use objects or a drawing to show your thinking, then explain your method to someone at home.