Solution:

Felix

Explanation:
Iron = Fe (chemical symbol)
59 = LIX (Roman numerals)

Solution:

In a clock.

Explanation:
time is 12 hour 10 minutes (here by looking at 2, we say 10 minutes)

Solution:

NONE, holes are empty.

Solution:

Slumdog Millionare = Slum + Dog + Million + air

Solution:

They can neither be true nor be false. They contradict each other and these statements are known as paradox.

Solution:

The timer of a microwave.

The timer of a microwave generally consists of 4 digits. First two digit for minutes and next two for seconds.
So,
99 indicates - 1 minute 39 seconds
100 indicates - 1 minutes (1:00)

Solution:

10 o'clock + 4 hours = 2 o'clock.

Solution:

7 (SEVEN-S=EVEN)

Solution:

9^9^9

(its not 999:p)

Solution:

Its a paradox

=> A sentence that always contradicts itself and yet might be true.