Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I

Before Mount Everest was discovered, what was the highest mountain in the world?

If six children and two dogs were under an umbrella, how come none of them got wet?

There are three light switches outside a room. One of the switches is connected to a light bulb inside the room.
Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

You need to arrange three 7 and mathematical symbols to form number 1?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

A sundial has the fewest moving parts of any timepiece. Which has the most?

Alpha is Beta's sister.

Gamma is a Beta mother.

Delta is Gamma's father.

Tango is Delta's mother.

Then,

How is Alpha related to Delta?