Surely ONE of these four words doesn’t belong… so why did 18 contestants get it wrong? The question looked almost ridiculously simple. Four ordinary words appeared on screen, and players had 30 seconds to identify the one that didn’t belong. No maths. No obscure trivia. No complicated sequence — just one small difference hiding somewhere among the four. Could you spot it before the clock hit zero?

The 1% Club alphabet question sends 18 contestants home in one brutal round

A deceptively simple word puzzle left 18 contestants out of the game after they failed to spot a hidden sequence of three consecutive letters. Would you have caught the answer in time?

A man in a suit looks thoughtfully at something off-camera.

The 1% Club has built its reputation around questions that appear straightforward until contestants are put under pressure. Hosted by Lee Mack, the ITV quiz sees 100 players begin the game, with the questions testing logic and common sense rather than traditional general knowledge.

One particularly unforgiving round demonstrated exactly how quickly a seemingly easy puzzle can go wrong.

During series two, episode five, contestants were given four words and asked to identify the one that does not contain three consecutive letters in alphabetical order.

The four choices were:

  • Unopenable
  • Understandable
  • Unquestionable
  • Undefinable

They had only 30 seconds to examine the words and decide which one was different.

Quiz question: Which word lacks three consecutive letters in alphabetical order? Options: Unopenable, Understandable, Unquestionable, Undefinable.

Can you spot the odd one out?

At first glance, the four words do not appear to have much in common beyond beginning with the letter U. The trick was hidden further inside each word.

The correct answer was C, Unquestionable.

The other three words each contain a run of three letters that appear consecutively in the alphabet.

Unopenable contains NOP, while Understandable contains RST. Undefinable contains DEF.

That leaves Unquestionable as the only option without a sequence of three consecutive alphabetical letters.

It was a classic 1% Club test: the information required was extremely simple, but contestants had to spot the pattern quickly while working against the clock.

Quiz: Which word lacks three consecutive alphabetical letters? Options: Unopenable, Understandable, Unquestionable, Undefinable.

18 contestants eliminated

The puzzle proved too difficult for 18 players, who were eliminated after choosing the wrong answer.

The scale of the exit made the moment particularly striking, with a large group of contestants disappearing from the game in a single question.

Lee Mack was left visibly surprised as players who had successfully navigated earlier rounds suddenly found themselves caught out by the deceptively worded puzzle.

The format of The 1% Club is designed to produce exactly these kinds of moments. One hundred contestants begin each episode, and the questions become progressively more difficult as the game continues, with the eventual aim of reaching the question that only 1% of the country is expected to answer correctly. The top prize can reach £100,000.

The 18 Out game show set with contestants.

Another question that wiped out 20 players

The alphabet puzzle was not the only question to cause major damage.

Earlier in the game, 20 contestants were eliminated by a picture question that asked them to count the number of right footprints in a scene showing footprints in the sand.

Lee Mack asked: “How many RIGHT FOOTPRINTS can you see in the sand?”

Contestants again had just 30 seconds to study the image and distinguish the right feet from the left ones.

The correct answer was eight.

The eight right footprints were subsequently highlighted in green, making it clear which footprints contestants should have been counting. The round reportedly cut the remaining field significantly, demonstrating once again how quickly a visual puzzle can catch out a large number of players.

Why the questions can be so difficult

The appeal of The 1% Club comes from the fact that contestants cannot simply rely on memorised facts.

ITV describes the programme as a quiz based on logic and common sense, with contestants of different ages and backgrounds able to take part without having to revise traditional general knowledge.

That makes the alphabet puzzle a fitting example of the show’s style. Every contestant already knows the alphabet, and none of the individual words is especially obscure. The challenge comes from recognising the hidden pattern quickly enough.

With only 30 seconds on the clock, even a familiar sequence such as DEF, NOP or RST can be surprisingly easy to overlook.

Contestants on a game show.

The answer one more time

If you want to test yourself without looking back through the explanation, here is the puzzle:

Which word lacks three consecutive letters in alphabetical order?

A. Unopenable
B. Understandable
C. Unquestionable
D. Undefinable

The answer is C: Unquestionable.

Unopenable → NOP
Understandable → RST
Undefinable → DEF

Unquestionable contains none of those three-letter alphabetical sequences.

With 18 contestants eliminated, it was a reminder that on The 1% Club, a question can look almost ridiculously simple and still bring the game to an abrupt halt.

The 1% Club airs on ITV1 and ITVX.