P, Q, R, S, T are five distinct positive multiples of 10 such that P < Q < R < S < T. These five numbers have a median of 100 and a range of 60. What is the value of T?

(1) Ratio of P:T is greater than 7:13.

(2) Q is not 80.

For each positive integer n, a_n=

A certain sequence is defined by the formula a_n=a_n–1–7. a7=7

2,7, …, 247 is an arithmetic sequence.

.25, .5, .75, 1, 1.25, 1.5, 1.75, 2.....

In the sequence of numbers a₁,a₂,a₃....,a_n......is defined by an= for each integer n≠1

.25, .5, .75, 1, 1.25, 1.5, 1.75, 2, . . .

S_n=3n+3
Sequence S is defined for each integer n such that
0 < n < 10,000.

Sequence S is such that S_n=S_n−1+and S₁=2

Sequence A is such that A_n=A_n−1−1.5 and A₁=18.5

A sequence has terms a₁,a₂,a₃,…….,a_n, where a₁=2 and general term is given as a_n=a_(n−1)× .