Vijeta Competitions Editorial Board Solutions for Chapter: Alphabet Test, Exercise 7: EXERCISE

How many $5$'s are there in the following sequence which are immediately followed by $2$ and also are immediately preceded by$8$?

$8 5 2 7 8 5 8 8 5 8 2 8 5 2 5 8$

How many $7$'s are there in the following number series each of which is immediately preceded and also immediately followed by an even number?

$2 7 5 8 7 3 9 7 6 7 4 7 7 6 5 4 2 7 8 2 7 4$

How many 0's are there in the following number series each of which is followed by 7 and preceded by 9?

3 5 7 0 9 0 8 0 7 0 1 0 7 9 0 9 2 3 4 0 7 3 4 5 9 0 2

Below is a given number series

$3 8 7 7 2 5 8 2 3 6 2 1 5 3 8 7 4 5 4 7 3 8$

How many instances are there in which an even number is followed by two odd numbers?

How many $5$'s immediately preceded by $4$ but not immediately followed by $3$ are there in the following sequence of numbers?

How many $7$'s are there in the following sequence which are preceded by $4$ but not immediately followed by $2$?

$4 7 2 7 2 3 5 9 7 4 7 5 2 4 7 9 4 7 8 4 7 1$

In the following series of numbers how many times have the figure 9, 1 and 8 appeared together 1 being in the middle and 9 and 8 being on either side of 1?

2 1 9 8 1 9 8 3 7 1 9 7 8 1 2 9 1 9 8 1 8 2 1 2

What will be the middle digit of the middle number after the following numbers are arranged in descending order?

$268, 197, 678, 129, 259$