Solution:

From top to bottom, the flavors are :

nutty-chocolate
peppermint
orange
Jamaica
walnut

Solution:

28 =>1+2+4+7+14

cannot be 1 (as number cannot be included)

Solution:

0! or cos(0)

Solution:

2(remember bodmas)

Solution:

I filled a glass full of water and held it over my head for 20 minutes.

Solution:

A green paint off-course :p

Solution:

Chicago

Solution:

I am a secret.

Solution:

2, 3, 10 and 10
To maintain the difference of eight and keeping in mind the third and fourth hint, the first and third cards can be 2 and 10 or 10 and 2. But keeping in mind the first hint, we know that the first card is 2 and the third is 10. Similarly, if we see the fifth hint, the difference between the second and fourth card should be 7. Thus we know that the second card is 3 and the fourth card is 10.

Solution:

See o double you