Brain Puzzle 3 Level 87

Overview

Level 87 is a classroom stealth puzzle in which two sleepy students must fall asleep at their desks without being punished by their strict teacher. The opening frame shows a Japanese-style classroom: a black-haired boy in a red school uniform rests his cheek on his hand, barely keeping his eyes open, while an orange-haired girl with twin tails sits at the neighboring desk with a thermometer in her mouth, also drowsy. A female teacher in a black suit and red glasses stands to the right holding a book, watching them. A progress bar at the top tracks the teacher's awareness, marked with her face icon. The bottom caption reads "I'm so sleepy, I'm about to fall asleep..." The completed state shows both students fast asleep with their heads on the desks, the teacher absent, and the classroom dimmed to night time with cherry blossoms visible through the window.

• Difficulty: Regular
• Estimated moves: 5

Step-by-Step Solution

1. Read the situation. Two students are exhausted during class, but the teacher is standing right next to them. They cannot simply put their heads down — the teacher will catch them. The blue lidded coffee cup on the boy's desk, the full chalkboard behind them, the backpack on the floor, and the closed window are all candidate interactive objects.

1. Create a smoke distraction. The first visible change after acting is that the coffee cup on the boy's desk disappears and the chalkboard (originally covered in math and physics formulas) becomes completely blank. The caption updates to "Why is there so much smoke?" indicating that smoke has been generated in the room. Interact with the coffee cup / desk area to trigger smoke — likely by tipping over the hot drink or using it to start a small distraction. The progress bar at the top gains a green segment as the smoke begins to draw attention away from the students.

1. Erase or clear the chalkboard. The chalkboard goes from full of formulas to blank between the opening frame and the second frame. This may be an automatic consequence of the smoke distraction, or a separate tap on the board. Either way, the board being empty signals that the teacher's focus is shifting away from lesson content.

1. Open the window. In the third frame, the large window on the right side swings open, revealing cherry blossom trees outside. The open window lets the smoke escape and also signals that the school day is ending. The backpack on the floor also opens, with books visible inside — suggesting the class is over and students are packing up.

1. Let the teacher leave. As the smoke clears through the open window and the classroom empties out, the teacher departs. In the final frame she is gone entirely.

1. The students fall asleep. With the teacher gone and the room darkening to evening, both students lower their heads onto their desks. The girl shows "Zzz" sleeping marks; the boy has a heart-shaped dream bubble above his head. The "Completed" banner appears with confetti.

Strategy & Reasoning

The puzzle logic is "remove the supervisor before allowing the students to sleep." Directly tapping either student to make them rest their heads would do nothing while the teacher stands there — she is the blocker. The smoke is the key mechanism: it creates a reason for the teacher to leave (or for the smoke alarm to trigger), and the open window provides ventilation that reinforces the end-of-day atmosphere. The progression of the progress bar at the top — starting empty, gaining a green fill as actions are taken — mirrors how much of the teacher's attention has been diverted.

The coffee cup is the most likely trigger for the smoke. In the first frame it sits steaming on the boy's desk; in the second frame it is gone entirely. The hot drink may have been knocked over or used in some way that produces smoke. The blank chalkboard reinforces that formal learning is over. The open window and the packed backpack both signal that class has ended.

There is no alternative route. Tapping the teacher directly does not make her leave; she only departs once the environmental triggers (smoke, open window, emptied backpack) have been set in motion. The girl's thermometer stays in her mouth through the middle frames — it is decoration, not an interactive item.

Tips & Common Mistakes

• Mistake: trying to put the students to sleep immediately. While the teacher is standing next to the desks, the students cannot rest their heads. You must first create the smoke distraction and open the window to make the teacher leave.
• Mistake: ignoring the coffee cup. The blue lidded cup on the boy's desk is the trigger for the smoke sequence. If you do not interact with it, the teacher will never leave.
• Mistake: forgetting the window. After the smoke is created, the window must be opened to let it escape and to signal the end of class. Skipping the window leaves the teacher in place.