Brain Test Level 99: My widowed granny has three children. They are all married with at least 1 child. My aunt has three nephews. What is the minimum number of chairs we need for the dinner?
Brain Test Level 99
Screenshots
Quick Answer
Calculate the minimum family members: Granny (1), 3 children with spouses (6), and 4 grandchildren (3 nephews + aunt's 1 child). Enter '11' on the keypad.
Skills Tested
Step-by-Step Solution
- 1) Count the granny as one chair.
- 2) Count the three children and their three spouses as six chairs.
- 3) Count four grandchildren, made up of the three nephews and the aunt's one child.
- 4) Add 1 + 6 + 4 to get 11 and enter 11 on the keypad.
Hint
Reveal a hint
Count the minimum group and remember that the aunt is already one of the children.
Why It Works
The key is to avoid double counting the aunt as an extra person. With the granny, three couples, and four grandchildren the total is 11, which you type on the keypad to finish.
Frequently asked questions
How do I solve Brain Test level 99?
Count the minimum family total of 11 people and enter 11 on the keypad to answer the chairs riddle.
What is the answer to Brain Test level 99?
The answer is 11 chairs, reached by adding the granny, three couples, and four grandchildren.
What is the trick in Brain Test level 99?
The trick is avoiding double counting: the aunt is already one of the three children, so you do not add her again as a separate adult.
Why are there four grandchildren in Brain Test level 99?
There are five children overall but four grandchildren, because the three nephews plus the aunt's one child are the minimum; the requesting narrator's own children are not added.
Why is the total 11 in Brain Test level 99?
The total is 11 because 1 granny plus 6 adults (three couples) plus 4 grandchildren equals 11 people who each need a chair.
Is there a video walkthrough for Brain Test level 99?
Yes, the embedded video on this page shows how to count the family to 11 and enter it to clear Brain Test level 99.