In a school, there are four subjects. Seventy percent of students study English, seventy five percent of students study Science, eighty five percent of students study Mathematics and eighty percent of students study Spanish.

Can you calculate the percentage of students that study all four subjects?

Can you place six X (crosses) in below board without making three in a row in any way ?

Can you name an animal whose killing cannot be performed without spilling your own blood?

In a jungle where there are no street lights or any other artificial source of lights, I notice a black snake crossing the road.
How did I get sight of the snake?

You are given 2 eggs.
You have access to a 100-storey building.
Eggs can be very hard or very fragile means it may break if dropped from the first floor or may not even break if dropped from 100th floor, Both eggs are identical.
You need to figure out the highest floor of a 100-storey building an egg can be dropped without breaking.
Now the question is how many drops you need to make. You are allowed to break 2 eggs in the process

If your uncle’s sister is not your aunt, what relation is she to you?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

12345 a famous South Indian actor
567 is a path in jumbled form
8 & 10 are same letters
9 is one among the first six alphabets.
WHO AM I?

I am never scared but became petrified and can’t live in a house but would die to make one. What am I?

Can you make a six-letter word using the letters N, A and B ?