Brain Test All-Star Level 21: Tap the blue squares.
Brain Test All-Star Level 21
Screenshots

Quick Answer
Tap only the blue squares while ignoring blue rectangles and other colored shapes.
Skills Tested
Step-by-Step Solution
- 1) Scan the shapes and identify which ones are squares.
- 2) Filter that group down to the blue squares only.
- 3) Tap each blue square.
- 4) Leave the blue rectangles and other colored shapes untouched.
Hint
Reveal a hint
Look for the squares that are blue, and leave the rectangles and other colors alone.
Why It Works
This is a careful observation test: blue rectangles look similar but are wrong. Matching both the color and the shape is the whole trick.
Frequently asked questions
How do I solve Brain Test All-Star Level 21?
Tap only the blue squares and ignore the blue rectangles and every other colored shape.
What is the answer to Brain Test All-Star Level 21?
Only the blue squares should be tapped; all other shapes, including blue rectangles, are wrong.
Why do I need to skip the blue rectangles in Brain Test All-Star Level 21?
The question asks for squares specifically, so rectangles are a trap even though they are the same color.
What is the trick in Brain Test All-Star Level 21?
The blue rectangles look nearly identical to the squares, so you must check the shape, not just the color.
Is there a video walkthrough for Brain Test All-Star Level 21?
Yes. The embedded video shows exactly which blue squares to tap.
How do I avoid getting stuck in Brain Test All-Star Level 21?
Slow down and verify each shape is a square, not a rectangle, before you tap it.