What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

I got a bee but no honey.
got an eye but am still blind.
got a sea but no water.
got a tea but no coffee.
got a why but no answer.

What Am I?

For an extra income, John decided to work at a Hotel for one hour daily. The manager offers him that they will pay him $11 after every 11 days.
However, John offered a different proposition to the manager. The offers stand as:
He will be paid just a penny on his first day.
Two pence will be paid on the second day,
Four pence will be paid on the third day.
And so on till the 11th day.

Should the Hotel manager accept his offer?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

You can see it everyday, But cannot touch it at will. What is it?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

Give it food and it will live; give it water and it will die.

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?