Question

How many even numbers are there in the following sequence of numbers, each of which, is followed by an odd number as well as preceded by an even number?

$86768932753422355228119$

Answer 1

Estimate the number of even numbers:

The given set of numbers is

$86768932753422355228119$

Given that the sequence of the required number must be followed by an odd number as well as preceded by an even number.

The numbers satisfying these conditions are,

$\begin{array}{l}8\underset{¯}{6}76\underset{¯}{8}93275342\underset{¯}{2}35522\underset{¯}{8}119\end{array}$

Hence, there are four such numbers satisfying the given condition.