Answer :
Perfect squares are:
02 = 0
12 = 1
22 = 4
32 = 9
42 = 16
52 = 25
62 = 36
72 = 49
82 = 64 > 50
The elements which are perfect square and x < 50 are 0, 1, 2, 3, 4, 5, 6, 7
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