Solution:

An apple a day keeps a doctor away :-)

Solution:

It can be done as below.

Solution:

It is the wind.

Solution:

6

Solution:

27

Explanation:
16/2 = 9
8*3 = 24
24/2 = 12
12*3 = 36
36/2 = 18
18*3 = 54
54/2 = 27
27*3 = 81

Solution:

30%

Explanation:
√9%
=> √9/√100
=> 3/10
=> 30/100
=> 30%

Solution:

1. Tiger doesn't have horns.
2. Number of squares in chess board are 49(7 x 7) instead of 64(8 x 8)
3. Sun do not rise at night (1pm)
4. The dog is having a tail like a cat.
5. Fish tank contains butterflies
6. The boy wearing shirt one with half and one with full.
7. Check guitar top, its like of Sitar
8. One window opens inside and another outside.
9. The man in the painting is wearing just one shoe.

Solution:

J = 1
O = 9
I = 6
N = 8
T = 3
(1+9+6+8+3)*(1+9+6+8+3)*(1+9+6+8+3) = 19683.

Solution:

Yes, by adding 'G' to 'One'
G + One => Gone

Solution:

It is possible when you write the numbers in their Roman form.
XI (11) - When you remove me from XI, it becomes X i.e. 10
IX (9) - When you remove me from IX, it becomes X i.e. 10