How many times can you subtract the number 5 from 25?

Can you write down eight eights so that they add up to one thousand?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

I am a word that begins with the letter “i.” If you add the letter “a” to me, I become a new word with a different meaning, but that sounds exactly the same. What word am I?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

Find the number of squares in the below picture

Which point will the car reach to go out?

A bridge is about to collapse. There are four people P, Q, R and S on one of the sides. Before the bridge collapses, they want to cross it. Now since the bridge is too weak, it can only stand the weight of two people at a time. Also, it is night time and nothing is visible. They have just one torch with them.

Now P takes one minute to cross the bridge, Q takes two minutes to cross, R takes five minutes to cross and S takes ten minutes to cross.

The bridge will collapse in seventeen minutes. How will they be able to cross the bridge before it collapses?

Can you decipher these quotes by Albert Einstein?
Blf xzm mvevi hloev z kilyovn lm gsv ovevo lm dsrxs rg dzh xivzgvw.

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?