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9 votes
9 votes

If $P = 3$, $R = 27$, $T = 243$, then $Q + S =$ ________

  1. $40$
  2. $80$
  3. $90$
  4. $110$
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3 Answers

Best answer
7 votes
7 votes

We can interpret the given order as:

  • $P\to 3^1= 3$
  • $Q\to3^2= 9$
  • $R\to3^3=27$
  • $S\to3^4=81$
  • $T\to3^5=243$

$Q+S\to 9+81=90$

Hence Option (C) is correct

selected by
10 votes
10 votes
Alphabetical order : P, Q, R, S, T

given that, P = 3

R=27

T = 343

 

by observing them, those are in GP with r = 3

So, Q=9, S=81

S+Q = 81+9=90
Answer:

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