Count each 1 in the following sequence of numbers that is immediately followed by 2, if 2 is not immediately followed by 3. How many such 1's are there ?
1  2  1  3  4  5  1  2  3  5  2  1  2  6  1  4  5  1  1  2  4  1  2  3  2  1  7  5  2  1  2  5

in the following sequence of instructions, 1 stands for Run, 2 stands for Stop, 3 stands for Go, 4 stands for Sit and 5 stands for Wait. If the sequence were continued, which instruction will come next ?
4  4  5  4  5  3  4  5  3  1  4  5  3  1  2  4  5  4  5  3  4  5  3

E. RUN

In a row of girls, Shilpa is eighth from the left and Reena is seventeenth from the right. If they interchange their positions, Shilpa becomes fourteenth from the left. How many girls are there in the row ?  

E. NONE OF THESE

How many 3's are there in the following sequence which are neither preceded by 6 nor immediately followed by 9 ?
9  3  6  6  3  9  5  9  3  7  8  9  1  6  3  9  6  3  9

B. TWO

Thirty six vehicles are parked in a parking lot in a single row. After the first car, there is one scooter. After the second car, there are two scooters. After the third car, there are three scooters and so on. Work out the number of scooters in the second half of the row.

C. 15