A cat had three kittens: Snophy, Topsy and Jorden. What was the mother's name?

What has many keys but can’t open a single lock?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

How many bananas can you eat if your stomach is empty?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

Find the missing number in the image below.

In the following series, a set of numbers is progressing with a particular pattern. Can you deduce that pattern and find the missing set?

(2 + 6), (21 + 6), (58 + 6), (119 + 6), ___

When I asked a girl's name she told me her name is the date '07/09/2001'.

I thought for a few seconds and then I got her name. Do you?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?