Solution:

75.

For a detailed explanation, please watch the video.

Solution:

51

For Explanation, Watch the video.

Solution:

38.

Watch the video for an explanation.

Solution:

405

For an explanation, watch the video.

Solution:

39.

Solution:

The hidden cat is encircled below.

Solution:

Since the beer bottle is closed, No glass will Ever fill.

The video-version of the puzzle is added below.

Solution:

The five hidden words are
1. Rush
2. Paint
3. Tap
4. Bucket
5. Roller

Solution:

If You can read this you are awesome.

Solution:

Door number-1.

The Symbols on the doors are actually number + mirror images of the number.