Question

list the numbers between 2 and 20 that are not rectangular numbers, what is the special names that we give to these numbers?

Answer 1

$\huge{\mathcal{\red{✿A}\green{N}\pink{S}\orange{W}\blue{E}\pink{R✿:-}}}$

==>>3,5,6,7,9,11,13,14,15,17,19

Answer 2

Answer:

theThe numbers that can be arranged to form a rectangle are called Rectangular Numbers (also known as Pronic numbers). The first few rectangular numbers are:

0, 2, 6, 12, 20, 30, 42, 56, 72, 90, 110, 132, 156, 182, 210, 240, 272, 306, 342, 380, 420, 462

Given a number n, find n-th rectangular number.

The numbers that can be arranged to form a rectangle are called Rectangular Numbers (also known as Pronic numbers). The first few rectangular numbers are:0, 2, 6, 12, 20, 30, 42, 56, 72, 90, 110, 132, 156, 182, 210, 240, 272, 306, 342, 380, 420, 462 . . . . . .

Given a number n, find n-th rectangular