I travel all around the world but always stay in the corner. What am I?

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?

You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _

How many times can you subtract the number 5 from 25?

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

The centre of the third figure is empty. What digit should fit inside?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

What is the next number in the series?

15 29 56 108 208 ?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?