Question

1,3,6,10.. are

• A. Triangular numbers
• B. Square Numbers
• C. Cube numbers

Answer 1

The correct option is A Triangular numbers

$\underset{–}{1}$
$1+2=\underset{–}{3}$
$1+2+3=\underset{–}{6}$
$1+2+3+4=\underset{–}{10}$

The numbers obtained by adding consecutive natural numbers are called traingluar numbers.

$\therefore 1,3,6,\mathrm{10...}$ are triangular numbers.