No, Irrational Numbers must continue past the decimal indefinitely, without a pattern, and can't be expressed as a fraction.
Not only does 2.56 stop at the hundredth decimal, but it can also be expressed as the fraction 256/100.
Its worth noting that 1.999999...forever repeating is also a rational number.
Irrational numbers are usually things like pi, the square root of two, etc.
162 is 256 and 172 is 289, so YES, √266 is irrational
65,536 = 256 x 256 = 256²
256
(247, 256, 256, 265) The mean is 256 The mode is 256 The median is 256
2563 = 256 x 256 x 256 = 16777216
Irrational. Irrational. Irrational. Irrational.
12% of 256= 12% * 256= 0.12 * 256= 30.72
256
75% of 256= 75% * 256= 0.75 * 256= 192
40% of 256= 40% * 256= 0.4 * 256= 102.4
34.9% of 256 = 34.9% * 256 = 0.349 * 256 = 89.344
256