Answer is 1.5
Step by step solution of the sequence is
The given sequence 2,5,1,4,1,5,2,0,2,1,1 is a combination of 2 series
I. 2,1,1,2,2,1
II. 5,4,5,0,1
Next possible number in the given sequence I. 2,1,1,2,2,1 is 1
Next possible number in the given sequence II. 5,4,5,0,1 is 1.5
∴ The next number for given series 2,5,1,4,1,5,2,0,2,1,1 is 1.5