Q.write first ten natural numbers whose dot pattern can be arranged as=
(a)square
(b)triangle
(a) 1, 4, 9, 16, 25, 36, 49, 64, 81, 100
(b) 1, 3, 6, 10, 15, 21, 28, 36, 45, 55
A number is called a triangular number if its dot pattern can be arranged in