Choose the numeral pair which is different from others.
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 15 - 165
In each pair, the second number is the first number multiplied by the number 2 less than it.
Option (1) 23 - 483 — \(23\times21=483\)
Option (2) 21 - 399 — \(21\times19=399\)
Option (3) 27 - 675 — \(27\times25=675\)
Option (4) 15 - 165 — \(15\times13=195\), not 165, so 15 - 165 is the odd one out