This is the question: The nth term of a sequence is given by Tn = 10n + 4. Put Tn < 100, and hence show that the nine terms T1 to T9 are less than 100. The answer is: < 9. Hence, there are 9 terms, 1 to 9 that are
less than 100.
But I don't understand, how do you know that from the answer of n, we can say 9 terms are less than 100? Please help me.

3382-299=3383- ? fill in the blank?

The median of a data set is the measure of center that is found by adding the data values and dividing the total by the number of data values that is the value that occurs with the greatest frequency that is the value midway between the maximum and minimum values in the original data set that is the middle value when the original data values are arranged in order of increasing (or decreasing) magnitude

Standard deviation of 19,29,21,22,23