Use the following answers.

Level 1: Find the same.
Bottom right box

Level 2: How many rats?
6

Level 3: Which number is closer than pi?
3.8

Level 4: Which one is the right logo color?
Top left brain.

Level 5: Click on True,
Tap "True".

Level 6: There is a hidden button
Just near the bottom.

Level 7: Where was the answer of the first question?
Tap bottom right.

Level 8: Memorize
(Memorize the color bars)

Level 9: On blue
Tap button where the blue line is highlighted.

Level 10: Bring to the green. No lives!
Drag the white ball to the green ball without touching any of the walls.

Level 11: (Look at screen)
Clock shows 13:40.

Level 12: Guess
Drag the grey circle to the circle line.

Level 13: Concentrate
Tap the circle when circle color = word at the bottom.

Level 14: Where the arrow points?
Swipe the rock to the right then tap the arrow that points down.

Level 15: Double half 2
Tap the number 2 in "Double half 2"

Level 16: Only when green
Click and start the timer, then tap the button when the arrow position is on the green area.

Level 17: (Look at screen)
The flag shown is Ghana.

Level 18: (Look at screen)
The question number is 18, the current level.

Level 19: Just like excel with column and row.
Tap the square at column 8, row 7.

Level 20: Get it.
Tap the green dot.

Level 21: Tap the perfect square
Tap the top left square.

Level 22: Click the snap
Top the piece (bottom left) that matches the broken edge.

Level 23: Put tones in order
Arrange the color shades from green on the left to blue on the right.

Level 24: Explode the right pump
Tap top left bomb

Level 25: Which one is the fastest?
Falcon

Level 26: (Look at screen)
-54

Level 27: Tap the smallest sphere
Tap the top right sphere.

Level 28: Save the rat.
Tap the box a few times until the rat can get out. Do not tap too many times.

Level 29: How many rounds?
4

Level 30: Arrange the blocks to see the hint.
Tap the "30" level number at the top of the screen three times.

Level 31: (Look at screen)
Tap the rightmost button (top right)

Level 32: Coin flip for the first time on this question
Tap A button

Level 33: Which question has no number?
Tap bottom right box

Level 34: This one was not my idea
Tap the "34" that is in the fourth column of the bottom row.

Level 35: I hope you have count
The number is 10

Level 36: How many times did Argentina was runner up in world cup?
Tap 3 in the level number "36" at the top

Level 37: Bring without touch anything.
Drag the white ball to the green dot without touching line and the letters.

Level 38: Get ready. No chases to fail.
Find the ball under the right cup.

Level 39: World population.
7.2 billion

Level 40: Almost sure you dont know the question number.
40

Level 41 (Look at screen)
Unknown

Level 42: Square root of 1089
33

Level 43: Attention, only one chance
Tap the green circle; do not be late

Level 44: Do it.
Slide, then tap green button.

Level 45: Concentrate
Tap when the color and letters match.

Level 46: Which one has the same thickness?
Tap the bottom right.

Level 47: (Look at screen)
Tap the square at column 7, row 2.

Level 48: Easy.
Move all the red blocks to the marked area

Level 49: Will recommend this game
Yes, I'll recommend this game.

Level 50: Just find the button.
Tap the boxes until you find the green button and then tap it. Do not tap the red buttons.