10+10 and 11+11 can give you the same answer.

Explain how?

You are given 2 eggs.
You have access to a 100-storey building.
Eggs can be very hard or very fragile means it may break if dropped from the first floor or may not even break if dropped from 100th floor, Both eggs are identical.
You need to figure out the highest floor of a 100-storey building an egg can be dropped without breaking.
Now the question is how many drops you need to make. You are allowed to break 2 eggs in the process

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

If 1+9+8=1, what is 2+8+9?

It is an eleven letter word.
The first, second, third and fourth letters form a banquet's name.
The fifth, sixth and seventh letters form a car's name.
The eighth, ninth, tenth and eleventh letters form a mode of transport.

Can you identify what word it is?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

A system error causes the change of John's net banking password. To sort this out, he calls the customer care. The following is the conversation he had with the executive:

John: My password has been changed.

Custom Care Executive: We have kept your password distinct this time. It has 8 letters out of which, 3 letters are the same as the previous one.

John: Okay, thanks.

Can you determine the old as well as the new password of John's net banking account after reading the conversation carefully?

What have one eye but still cannot see?