Brain Test Level 133: What should we put at the question mark?
Brain Test Level 133
Screenshots

Quick Answer
The letters represent the first letter of numbers 1-8 (One, Two, Three...). Select 'N' for 'Nine' and tap the checkmark.
Skills Tested
Step-by-Step Solution
- 1) Notice that each letter on screen is the first letter of a number, such as O for One and T for Two.
- 2) Continue the pattern through the numbers 1 to 8 to see which number follows the sequence.
- 3) Realize that the next number is Nine, so the required letter is N.
- 4) Select the letter N and tap the checkmark to finish the level.
Hint
Reveal a hint
Look at the pattern of first letters of the numbers going 1, 2, 3, and think about what comes next.
Why It Works
The sequence maps each number to its first letter, so after One, Two, Three and so on up to eight the pattern continues to Nine. Because Nine begins with N, that is the letter to select, and confirming it with the checkmark completes the level.
Frequently asked questions
How do I solve Brain Test level 133?
Recognize that each letter is the first letter of a number, and select N because the next number in the sequence is Nine.
What is the answer to Brain Test level 133?
Select the letter N, since it is the first letter of Nine, and tap the checkmark to confirm.
What is the trick in Brain Test level 133?
The letters are the first letters of numbers from One to Eight, so you must continue the number pattern instead of treating it as a random riddle.
Why is the letter N the right choice in Brain Test level 133?
N is needed because the sequence of number-first-letters continues to Nine, and Nine begins with the letter N.
How does the letter pattern work in Brain Test level 133?
Each letter stands for the first letter of a number: O for One, T for Two, and so on, so the missing spot is filled by Nine leading to N.
Is there a video walkthrough for Brain Test level 133?
Yes, the embedded video on this page shows exactly which letter to choose and confirms N with the checkmark.
Where is the question mark in Brain Test level 133?
The question mark sits at the end of the number-letter sequence, and you fill it by selecting N for the next number, Nine.