A #Square Number# is the result of multiplying an integer by itself. For example, 4 x 4 = 16. The first 5 square numbers are shown below in a diagram form:
A shorthand way of writing a square number is to use an #index#: 4 x 4 = 42.
Square numbers can be written as a sequence:
| Term | 1 | 2 | 3 | 4 | 5 | ... |
| 12 | 22 | 32 | 42 | 52 | ... | |
| Value | 1 | 4 | 9 | 16 | 25 | ... |
What is the next square number after 81?
81 is 92. The next square number is 102, which is 100.
Answer: 100
What is the value of the 12th square number?
12 x 12 = 144.
Answer: 144
See also Squares