Which of the following numbers are perfect squares?
11, 12, 16, 32, 36, 50, 64, 79, 81, 111, 121
11: Since 11 is a prime number,
Hence, it is not a perfect square
12: Since, 12 is ending with 2,
Hence, not a perfect square
16: Since, 16 = 4 × 4
= (16)2
Therefore, it is a perfect square
32: Since, 32 is ending with 2,
Hence, not a perfect square
36: Since, 36 = 62
Hence, it is a perfect square
50: Since, 50 = 52 × 2
Hence, it is not a perfect square
64: Since, 64 = 82
Hence, it is a perfect square
79: Since it is a prime number so it cannot be a perfect square
81: Since, 81 = 92
Hence, it is a perfect square
111: Since, 111 is a prime number so it cannot be a perfect square
121: Since, 121 = 112
Hence, it is perfect square