If the average of the first `n` numbers in the sequence 148, 146, 144, ..., is 125, then `n=`

Find the average of first n-natural numbers.

Find the first terem of the sequence: t_n=4n-3

Find the first terem of the sequence: t_n=3n+1

Find the first terem of the sequence: t_n1/n^2-1

There are three numbers. If the average of them is added to the three numbers, the sums obtained are 167, 153 and 148. What is the average of the given numbers?

Write first three terms of the sequence a_n=(n-3)/(4) .

Average of all even numbers between 104 and 148 is _____