There is a square piece of paper with a hole that is denoted by the circle on the top right side in the given picture. You have to cut the paper in a manner that it forms two and only two separate pieces of paper and then rearrange the pieces in a manner that the holes come in the centre of the paper.

What is the next number in this matchsticks series riddle?

John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

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

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?

What Time Should the last watch show in the below figure?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

Which Burger Is Different in below image?