What should come next in the series below?
45G54, 47J57, 50N61, 54S66, ?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 59Y72
In a number-letter series, each part of the term follows its own rule, so the first numbers, the letters and the last numbers are checked separately.
First numbers 45, 47, 50, 54: they grow by +2, +3, +4, so the next grows by +5: \(54+5=59\)
Letters G (7), J (10), N (14), S (19): they move 3, 4, 5 places ahead, so the next moves 6 places: \(19+6=25\), which is Y
Last numbers 54, 57, 61, 66: they grow by +3, +4, +5, so the next grows by +6: \(66+6=72\)