If eleven plus two equals one, what does nine plus five equal?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

A pack of cards has 40 cards. You are blindfolded. Out of 40, 25 cards are facing down while 15 are facing up. You have been asked to divide this pack of cards into two decks - so that each deck contains an equal number of face-up cards. Remember, you are blindfolded.

How will you do it?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

Find the next number in the series below

21 32 54 87 131 ?

What is always in front of you but can’t be seen?

Before Mount Everest was discovered, what was the highest mountain in the world?

Can you replace the question mark with the correct letter?

6 + 6 + 6 = N
7 + 7 + 7 = E
8 + 8 + 8 = R
0 + 0 + 0 = ?

A man fell off a smuggling boat into deep water. He could not swim and he was not wearing anything to keep him afloat. It took 30 minutes for the people on the boat to realize someone was missing. The missing man was rescued two hours later on the return trip. Why didn't he drown? Note:- He didn't know swimming, the sea was deep, and He wasn't holding anything

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?