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

Chhote se Chintu Miyan,
Lambi si Pooch.
Jahan Jaye Chintu Miyan,
Wahan Jaye Pooch.

छोटे से चींटू मियाँ,
लंबी सी पूंछ।
जहाँ जाये चींटू मियाँ,
वहाँ जाये पूंछ।

Bolo kya?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

Which country gets ill every time?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

What are the next two letters in the following series and why?
W A T N T L I T F S _ _

*Hint: Check Puzzle Title

The captain of a ship is telling you an interesting story and then poses a question. He says, “I have travelled the oceans far and wide. One time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly. Can you tell me how that was possible?”

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

Rearrange the letters in "new door" to make one word.

I am an odd number. Take away a letter and I become even. What number am I?