Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

Two boys wish to cross a river. The only way to get to the other side is by boat, but that boat can only take one boy at a time. The boat cannot return on its own, there are no ropes or similar tricks, yet both boys manage to cross using the boat.

How?

I cannot talk, but I always reply when spoken to. What am I?

The pound is not a finish.

We are sharing a few instructions below, which you have to use in any suitable order to modify the above sentence such that the end sentence is a scientific fact.

- Eliminate a letter and supplement another in its place.
- Take away one word.
- Remove one letter from one word.
- Get rid of two letters from one word.
- Swap a word with its antonym.

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

1 dollar = 100 cent
= 10 cent x 10 cent
= 1/10 dollar x 1/10 dollar
= 1/100 dollar
= 1 cent

=> 1 dollar = 1 cent

solve this tricky problem?

What demands an answer, but asks no questions

What is so fragile that saying its name breaks it?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?