Question

Triangular numbers are formed by which process?

Options

• Multiplying the term number by three

• Summing consecutive numbers starting from one

• Finding the difference between two square numbers

• Multiplying the previous term by two

Answer 1

Summing consecutive numbers starting from one

Explanation:

Triangular numbers (1, 3, 6, 10, ...) are formed by the sum of sequential natural numbers, such as 1 + 2 + 3 = 6.