An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?

I have some blue and red sock in my drawer. I have a total of 4 socks. I pick 2 socks and the chance that I get a pair of red socks is 1/2.

What is the chance of picking a pair of blue socks?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

When we see 2 but call 10?

In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls, will you have to pick up so that you have at least 4 balls of the same colour?

What is the last thing you take off before bed?

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

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

I am five letter word that is under you.
If you remove my 1st letter, then I am over you.
If you remove my 1st and 2nd letters then I am all around you.

Who am I?