Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

Different lights make me strange by changing me into different sizes. What am I?

Find the hidden panda in the image below.

When we see 2 but call 10?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

A Shopkeeper sold a few chickens to four different customers on a particular day. It was such that each customer purchased half of the remaining chickens and half the chicken more.

Can you find out how many chicken were sold by the shopkeeper on that day if we tell you that the fourth customer bought a single chicken ?

A girl says this to her best friend: “I was born in 1955, and I celebrated my 17th birthday last weekend.” Her best friend thinks she’s lying, but she’s actually correct. How is that possible?

Below is the sum of symbols in each row and column in the figure. Analyzing the figure, can you find out the value of the symbols?

Identify the 10 differences between the two given pictures.

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?