It is given in the question that, there is a number pattern that begins with 250 and subtracts 13 .
And we have to find the fourth number of this pattern .
250 is the first number.
Second number is the difference of 250 and 13 equals to 237.
THird number is the difference of 237 and 13 equals to 224 .
Fourth number is the difference of 224 and 13 equals to 211 .