Solution:

Chair.

Solution:

The mules is moving in circular path and hence outside legs travels more distance than inner legs.

Solution:

One Minute building

building 62 => Sixty second building => One minute building

Solution:

Align the toothpicks to form TEN. Use one toothpick for each of the lines.

Solution:

It can surely be true because it is not mentioned that it was raining.

Solution:

The matchsticks that are marked with red are to be removed and the final figure will have just two squares. You can remove either pair from the possible four ways.

Solution:

2100 miles.

Each vowel equivalent to 500 and each consonant equivalent to -200

Solution:

If the man killed himself, he would not have been able to rewind the cassette. Thus it is clear someone else killed him.

Solution:

Daughter.

Solution:

-3 -1 1

Explanation:
-3 * 1 * -1 = 3(prime)
-1 - (-3) = 1 -(-1) = 2

Solution:

192 021

If you look at it as two-digit numbers you'll see:10 11 12 13 14 15 16 17 18 19 20 21