What goes up but never comes down?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

Can you find out which options fits best with the missing column?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

What word begins and ends with an E, but has only one letter?

Different lights make me strange by changing me into different sizes. What am I?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

Let's play a word game. Following are some meaningless words that can be completed by adding random letters on either side of the word.

For example, the word "rdo" can be formed into "pardon".

Using the same technique, can you complete the given words?
ecalc
airb
rinci
tibac
uidel
gorit
igna
eyho

Two trains start at the same time, one from Bangalore to Mysore and the other from Mysore to Bangalore. if they arrive at their destinations one hour and four hours respectively after passing one another, how much faster is one train running than the other?