What's the missing number : 9876, 6447, 2527, x.?

The given pattern is 9876, 6447, 2527, x

We have to find the missing number 'x' in the given pattern.

We will use hit and trial method to get this missing number.

Let us observe the given pattern.

I have assumed the unknown number as - 1884

that is the sequence becomes as

9876, 6447, 2527, - 1884

Consider the difference of first term from second term that is 6447 from 9876.

6447 - 9876 = - 3429

Consider the difference of second term from third term that is 2527 from 6447.

2527-6447 = - 3920

Consider the difference of third term from fourth term that is 2527 from - 1884

= - 1884-2527

= - 4411

By computing the differences, we get

-3429, - 3920, - 4411

Now, the difference of - 3429 from - 3920

= - 3920 - (-3429)

= - 491

Now, the difference of - 3920 from - 4411

= - 4411 - (-3920)

= - 491

Which is same.

Therefore, the missing number 'x' is - 1884.