Letter–Number Sequencing
Remember a mixed sequence, then put the numbers in order and the letters in alphabetical order.
4 characters per run · Numbers and English letters
Three runs. Watch each sequence once.
Type the numbers first, then the letters. No time limit for your answer.
Example
An example to explore. No score or practice round is recorded.
Levels are provisional. This English practice uses letters A–Z and digits 1–9 shown on screen.
- Answered
- 0 / 3
- Active time
- 0:00
Ready for the sequence?
Numbers from smallest to largest, then letters from A to Z.
- Shown
- Your answer
- Correct order
Review replay. Your checked answer stays the same.
Practice complete
- Characters in place
- Exactly correct runs
- Active practice time
These results describe this practice, not an IQ score.
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Optional and off by default. Share starts, completions, replays and error categories. For visits from ChatGPT, starts and completions can also include the first QuickenBrain page and broad country. No answers, drawings or names.
How this data is usedHow to practise
Watch the characters in the same place, one at a time. After they disappear, type every number in ascending order, followed by every letter in alphabetical order.
For example, B 3 A 1 becomes 1 3 A B. Uppercase and lowercase answers are accepted. There is no audio in this version.
You can replay a sequence only after checking your answer. Longer levels add more characters to remember and reorder.
Active time includes watching and answering, and pauses while this page is hidden or you read the review. Only completed three-run rounds are saved.
About this practice
Learn a method
Sort digits, then lettersRemember a mixed sequence, then put the numbers in order and the letters in alphabetical order.
Report a problem
Optional and off by default. Share starts, completions, replays and error categories. For visits from ChatGPT, starts and completions can also include the first QuickenBrain page and broad country. No answers, drawings or names.
How this data is used