Can you make a six-letter word using the letters N, A and B ?

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

Find the next number in the sequence

1, 2, 6, 21, 88, __?

A girl was standing near the window thinking something. All of a sudden she decides something and throws something out of the window. She dies very soon after throwing it. She was perfectly healthy and had no disease or allergy. No one killed her and she did not commit suicide.

Can you think of any possible explanation that is logical as well for what happened there?

There are seven sisters in a house in a village where there is no electricity or any gadget.

Sister-1: Reading Novel
Sister-2: Cooking
Sister-3: Playing Chess
Sister-4: Playing Sudoku
Sister-5: Washing clothes
Sister-6: Gardening

what is Sister-7 doing ?

You throw me out when you want to use me and you take me in when you don't want to use me.

Who Am I?

Can you make a fire with just a single stick?

I’m tall when I’m young, and I’m short when I’m old. What am I?

If 24H in a D => 24 hours in a day.
What does "64S on CB" stand for?

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?