Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

How many letters are in the alphabet?

John was a very careless driver, so his owner Jacob gave him an offer that he will get an incentive of Rs.30 for every bottle box he delivered without breaking it and he will be charged Rs.90 for every bottle box he broke. Jacob gave John 100 bottles-box to deliver. After delivery, Jacob paid John Rs.2400. How many bottles-box did John break?

I’m tall when I’m young, and I’m short when I’m old. What am I?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

I am a type of food that is often found in the fridge and can be white in colour. What I am?
Hint 1: I am a dairy product.
Hint 2: You can spread me on the bread.

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

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