A subtraction rule was used to make the pattern of numbers in the table.

If the pattern continues, then the next two numbers will be

The correct answer is: 400, 250

The given sequence is 1000, 850, 700, 550
We have to find the next two terms in this sequence.
Let’s find the difference between the first and second term. It will be the constant that is subtracted from all the terms.
Constant = first term – second term
= 1000 – 850
= 150
So, the difference between each term is 150
Let’s see how it works for every term.
850 – 150 = 700
700 – 150 = 550
Now, let’s find the next terms.
The last term from the above sequence is 550
So, we will subtract 150 from the term.
550 – 150 = 400
This will be our new first term. We will take this term and subtract 150 to get next term
400 – 150 = 250
We got the new terms, “400” and “250”. We will see which option matches these values.
The complete sequence will be 1000, 850, 700, 550, 400, 250
And the option which is '400, 250’, is the required option.

For such questions, we should know the basic operations. When the rule used to write the pattern is not mentioned, we have to use all four operations to check the pattern. The operations are addition, subtraction, division, and multiplication.