You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

Which five letter word can be added at the end of below word to form a
valid word?

> Pin
> Check
> Boiling
> View

When is the top of a mountain similar to a savings account?

As we know that white starts the game of chess. Can you find the scenario shown in the picture below is possible when all the white pieces are at the original place while the black pawn is not as in the below picture?

If 2 workers can complete painting 2 walls in exactly 2 hours.

How many workers would be needed to paint 18 walls in 6 hours?

I want to fill my bucket using both cold and hot water.
I have two taps for both cold and hot water. The hot water tap fills the bucket in exact 6 hours and the cold water tap fills the bucket in exact 4 hours.
I turn both of them simultaneously but I forgot to turn off another tap which removes the water out of the bucket. This tap can empty the bucket in 12 hours.

How Long will it take to fill the bucket?

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

Using eight eights and addition only, can you make 1000?