Solution:

Check a lipstick mark on the glass of the kitchen.

Solution:

3 1 2 2 1 1
1 3 1 1 2 2 2 1

Read Line as one 1 => 1
Read Line 2 as two one => 2 1
Read Line 3 as one two and one one => 1 2 1 1
and so on.

Solution:

100

Series of number that do not contain albhabet 'T'

Solution:

Treasure Map Is Hidden Inside The Hanging Room Floor.

Explanation.
Just reverse the text "roolF mooR gnignaH ehT edisnI neddiH sI paM erusaerT".

Solution:

Playing chess

Game needs two players so Brother-8 is playing chess with Brother-2

Solution:

I + IX = X

The equation read from the other side becomes X = XI + I which is false.

Solution:

Q = 1
U = 9
I = 6
C = 8
K = 3.

Explanation:
Replace values in( Q + U + I + C + K)^3 = QUICK
(1+9+8+6+3)^3 = 19863
27^3 = 19863
19863 = 19863

Solution:

Old password : altered

New Password : distinct

Solution:

The Stars

Solution:

Baseball umpire and the Catcher (Eden Hazard was playing baseball.)

Solution:

7 Races.