Choose the pair of numbers which is different from others, among the given options.
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (100, 30)
In three of the pairs, the first number is three times the second, plus 5:
Option (1) (140, 45) — \(45\times3+5=140\)
Option (2) (110, 35) — \(35\times3+5=110\)
Option (3) (100, 30) — \(30\times3+5=95\), not 100, so (100, 30) is the odd one out
Option (4) (80, 25) — \(25\times3+5=80\)