Question 1: The symbols are arranged according to Fibonacci sequence, and the recurrence formula is: x 1 = 1, x2 = 2, xn = x (n- 1)+x (n-2), for example:1232.

Question 2: Let the actual score be Y and the abbreviated score be X.

So, y=x+90.

The (1) score over 0 is excellent, so the excellent rate is 6/ 10=60%.

(2) The total score = 90 *10+7-2-12+10+8-1+5 = 915 with an average score of 915.