I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

Count the number of triangles in the below picture?

One fine day, an intellectual man came to the emperor's court with the aim of testing Birbal's wittiness. In order to do this, he challenged Birbal to answer his question and hence prove that he was as intelligent and witty as he was said to be.
He asked Birbal, Do you want me to ask one difficult question or a hundred easy ones?
Since both Akbar and Birbal had had a tough day and were eager to leave, Birbal hastily told the intellectual to ask him a single difficult question.
Intellectual: OK. Tell me what came first into the world, the egg or the chicken?
Of course, the chicken, Birbal replied with a smile.
This time with a note of victory in his voice, the intellectual asked Birbal, How will you demonstrate that?
What did Birbal say?

When it's bad luck to meet a black cat?

I add 5 to 9 and get 2. The answer is correct, so what am I?

If you go to the movies and you're paying, is it cheaper to take one friend to the movies twice, or two friends to the movies at the same time?

Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?

Name a key which is hardest to turn.