Brain Test 5 Level 94

Overview

This level is a number-fill puzzle built around an empty three-by-three grid. The top-left slot already shows the number 1, and a row of loose numbered circles lies below the grid waiting to be placed. The prompt simply says "Fill the slots," and the intended arrangement is the natural counting order across the rows. There are no walls to slide or cars to route around; the task is recognizing that each row should continue the sequence from left to right.

• Difficulty: Easy
• Estimated moves: 9

Step-by-Step Solution

1. Read the prompt "Fill the slots." and study the empty grid. The first cell in the upper-left corner is already filled with 1, which fixes where the counting sequence begins.
2. Look at the loose number circles below the grid. They carry the digits needed for the remaining cells, so sort your mental order before dragging anything to avoid dropping a number into the wrong slot.
3. Fill the top row next to the given 1. Place the 2 in the middle top cell and the 3 in the right top cell, completing the first row as 1, 2, 3.
4. Move to the middle row and continue the sequence from 4. Drop the 4 into the left middle cell, the 5 into the center, and the 6 into the right middle cell, so the row reads 4, 5, 6.
5. Complete the bottom row with 7, 8, and 9. Place the 7 in the lower-left cell, the 8 in the lower-middle cell, and the remaining 9 in the lower-right cell.
6. Check every row once the circles are seated: the top row should read 1-2-3, the middle row 4-5-6, and the bottom row 7-8-9.
7. When the sequence is consistent across all nine slots, the filled circles turn green and the round registers as solved.
8. If a number refuses to seat, it usually means the neighboring row already broke the order; lift it out and re-check whether it belongs one cell earlier or later in the counting run.

Strategy & Reasoning

The given 1 in the corner is the anchor that reveals the pattern. Once you see that the grid starts counting from 1, the most natural layout is row-major order: finish the first row, drop to the second row, then finish the third. Trying to fill columns first or matching equal digits together breaks the sequence and leaves duplicate-looking numbers in the wrong places.

The loose circles include a repeated 6, which can make placement feel ambiguous. Resolving that duplicate comes back to the row order: one 6 belongs in the middle row, and the counting position tells you which 6 is needed rather than choosing between them at random.

Because the grid is only three by three, a quick sanity check catches most mistakes. Compare each cell with the one before it: the value should increase by one moving right, and the first cell of each row should follow the last cell of the row above. When every row lines up, the green circles confirm the arrangement.

Tips & Common Mistakes

• Do not fill the grid column by column; the accepted pattern runs across each row in counting order.
• Do not place the repeated 6 in the bottom row; only one 6 belongs in the middle row, at the right end.
• Do not assume a missing digit has to be invented; use the circles provided and follow 1 through 9 around the grid.