Can You Spot the Hidden Tricks?

The answer is y.

The pattern is based on finding the sum of the numbers and then taking the last letter of that sum when spelled out as an English word.

Here is the pattern applied to each row:

• 1 + 1 + 1 + 1 = 4: The word is “Four“, which ends in r.

• 2 + 2 + 2 + 2 = 8: The word is “Eight“, which ends in t.

• 3 + 3 + 3 + 3 = 12: The word is “Twelve“, which ends in e.

• 4 + 4 + 4 + 4 = 16: The word is “Sixteen“, which ends in n.

Following this exact rule for the final equation:

• 5 + 5 + 5 + 5 = 20: The word is “Twenty“, so the missing letter is y.