Represent the triangular number 45 pictorially using dots. Represent the cube number 216 pictorially.

Represent the triangular number 45 pictorially using dots. Represent the cube number 216 pictorially.

Question 1.

Represent the triangular number 45 pictorially using dots.

Solution:

Pictorial representation of 45:

9 dots in the last row.

Question 2.

Represent the cube number 216 pictorially.

Solution:

Pictorial representation of 216:

Each side is divided into six equal parts.

Question 3.

Represent the hexagonal number 61 pictorially using dots.

Solution:

Pictorial representation of 61:

Make 5, 6, 7, 8, 9, 8, 7, 6, 5 dots in nine rows.