Solution:

Empty.

(mpt, emty or mt depending on your interpretation)

Solution:

5795
+ 6435
+ 2505
------
14735

5305
+ 2475
+ 6595
------
14375

Solution:

A parachute that didn't open.

Solution:

pi * z * z * a

Solution:

0
Their is a zero in your phone.

Solution:

A Hole

Solution:

14

Explanation
If the beggar can make a whole cigarette from 6 butts then he can make 12 cigarettes from the 72 he found. Once he smokes those, he then will have another 12 butts, which gives him enough to make another 2 cigarettes. A total of 14.

Solution:

A and W.

The letters are the first letters of the words in the question. Thus, the next two letters are A and W.

Solution:

The Outside

Solution:

BACK

All the others can also be read backwards as proper words.

Solution:

15dollars

The cost is equal to 3dollars for each letter in the fruits name.

Solution:

They all read the same rightside or upside down.

Solution:

61

Reversed digits of squares of number in descending order.

Solution:

fsh

no eye => no i
=> fish -i
=> fsh

lolz

Solution:

Smoke

Solution:

F

Explanation: The letters are the first letter of each of the twelve months. The second month is February.

Solution:

nine games

Solution:

1,2, & 3

1 x 2 x 3 = 6 and 1 + 2 + 3 = 6

Solution:

Submarine

Solution:

2100 miles.

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