1, 4, 9, 16, 25.
If 0 is not counted, and 1 is, then the answer is 1000.
There are three perfect squares between 0 and 50 that are even.
The length must equal the width, and the sides must be parallel. However, if you are asking about perfect squares like the number 2,9,16 etc. you simply multiply any integer by itself and the answer is a perfect square. That includes 0 and 1 so since 0 times itself is 0 and 1 times itself is 1, those are perfect squares too.
31 is a prime number. Please note that all perfect squares are composite, except 0 and 1.
1, 4, 9, 16, 25.
If 0 is not counted, and 1 is, then the answer is 1000.
0, 1, 4, 9, 16, and 25.
6 and 28
The perfect squares that are less than 20 are 0, 1, 4, 9, and 16.
There are three perfect squares between 0 and 50 that are even.
The length must equal the width, and the sides must be parallel. However, if you are asking about perfect squares like the number 2,9,16 etc. you simply multiply any integer by itself and the answer is a perfect square. That includes 0 and 1 so since 0 times itself is 0 and 1 times itself is 1, those are perfect squares too.
Any number squared except 0 is a perfect square so it follows that prime numbers are less common than perfect squares.
1
1,4,9,16,25,36,49,64,81,100
There are infinitely many such numbers. For example, any irrational number between 0 and 1. The principal square root of any number between 0 and 1 which is not a ratio of perfect squares. Such a number will have infinitely many digits, and lie between 0 and 1.
"Perfect square" refers to the square of a whole number, starting with: 02 = 0 12 = 1 22 = 4 32 = 9 etc.