Brain Test Level 278: What is the question mark?
Brain Test Level 278
Screenshots
Quick Answer
Sum the numbers at the corners of the left triangle (4 + 5 + 10 = 19) and enter '19'.
Skills Tested
Step-by-Step Solution
- 1) Look at the left triangle and find the numbers at its three corners.
- 2) Add the corner values together: 4 + 5 + 10.
- 3) Confirm the result is 19.
- 4) Enter 19 as the question mark to complete Brain Test level 278.
Hint
Reveal a hint
Add the corner numbers of the triangle shown on the left.
Why It Works
Two triangles are shown, and the left one gives the rule. Adding its three corner values of 4, 5, and 10 produces 19, which is the value you type to fill in the question mark.
Frequently asked questions
What is the question mark in Brain Test level 278?
The question mark is 19, which comes from adding the corner numbers 4 + 5 + 10 of the left triangle.
How do I solve the pattern in Brain Test level 278?
Add the three numbers at the corners of the left triangle (4 + 5 + 10 = 19) and enter that total.
What is the trick in Brain Test level 278?
The trick is that you must sum the corner values of the triangle instead of doing any more complicated math.
Which triangle gives the answer in Brain Test level 278?
The left triangle gives the rule, and adding its three corner numbers produces the answer of 19.
Is there a video walkthrough for Brain Test level 278?
Yes, the embedded video on this page shows how the corner numbers are added to reach 19.
Is the answer an even number in Brain Test level 278?
No, the answer is 19, which is an odd number that comes from the sum of the three corners.