Brain Blow Level 11

Overview

Four shapes appear on the board: a plain red square at the top left, a red outlined circle at the top right, a green outlined square at the bottom left, and a small outlined red square at the bottom right. The prompt asks which figure is extra here. Three of the shapes share a black outline around their edge, while one red square has no outline at all. The un-bordered figure is the odd one out, and it is tapped directly. The grouping detail is the border, so color and shape alone will not separate the four cleanly.

• Difficulty: Easy
• Estimated moves: 1

Step-by-Step Solution

1. Examine each figure and note whether it carries a thin black outline around its edge. The circle, the green square, and the small red square all show this outline, which groups them together as the matched set.

1. Compare the two red squares: the small one at the bottom right has an outline like the other grouped shapes, while the larger red square at the top left is filled only, with no border around its edge.

1. Recognize the plain red square as the extra figure, because it breaks the shared outline rule followed by the other three. Its shape and color alone do not match the common style, and the missing border is the visible difference.

1. Tap the plain red square in the top left to select it as the extra figure. The level completes once the un-bordered shape is chosen; the outlined figures remain as the grouped set and should not be tapped.

1. Once you have identified the un-bordered red square, double-check the other three figures to confirm each one keeps its black outline, so you are not swapping the outlier with a grouped shape. The plain square may look similar in color to the small red square, but the missing border is the detail that separates them. Tapping the outlined small square by mistake will reject the choice, so read the edge of the target figure one last time before confirming.

Strategy & Reasoning

Odd-one-out levels usually hide the rule in a shared detail rather than in the most obvious feature. Here the grouping is not by color, since red appears twice, and not by shape alone, since squares appear twice. The consistent detail across three figures is the black outline, so the figure missing that outline is the outlier.

Looking only at color would split the red shapes against the green one, which produces two groups instead of one odd item. Looking only at shape would split the squares against the circle, another ambiguous split. The outline is the only detail that cleanly separates three figures from one, which makes the plain red square the defensible answer.

Tips & Common Mistakes

• Do not judge the figures by color alone; two shapes are red and two are squares, so neither color nor shape gives a clean odd-one-out.
• Check the edge of every shape for the black outline before deciding; the plain square lacks this border while the others keep it.
• Tap the large plain red square in the top left, not the small outlined red square in the bottom right, since the small one still belongs to the outlined group.