9, 16, and 25 are square numbers.
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The square roots of three are examples of irrational numbers.
There are no three consecutive numbers that are squares. Otherwise, there are an infinite sets of squares of three consecutive numbers: for example, {1,4,9}, or {4,9,16} or {576, 625, 676}
You can. Just add the numbers together, and find their square root. One plus three is four; the square root of the sum is two.
100 + 49 + 1
There are no rational numbers between sqrt(-26) and sqrt(-15). The interval comprises purely imaginary numbers.