Look at the series: Z 7 @ 4 P % C 9 5 T E # 2 S 8 U & 6 A 3 W !. If every digit is dropped from the series, which element then stands eighth from the left end?

Dropping the eight digits leaves Z @ P % C T E # S U & A W ! — fourteen elements. Counting from the left: Z, @, P, %, C, T, E, #. The eighth is #. E at the seventh place and S at the ninth are the neighbouring off-by-one errors, and T at the sixth is where you land if you forget to drop one of the digits.