In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

You are given 16 witch hats. The hats are divided in four different colours – red, blue, green and yellow. Every colour has been assigned to four hats. Now each of the hat will be glued with a label of an arithmetic sign – ‘+’, ‘-‘, ‘x’ or ‘/’. But you can label one sign only once on one colour. In such an arrangement, the hats can be uniquely defined by its colour and symbol.

Can you arrange all the 16 hats in a 4x4 grid in a fashion that no two rows and columns have a repetition of colour or sign?
We have arranged four hats in the below picture to assist you.

What has a ring but no finger?

Why is it very easy to weigh a fish?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

What has no start, end, or centre?

Which city is three-fifths chick two third cat and 50% goat?

I am sure no one can have two things for dinner. what are they?

Find the next number in the following series:
6, 14, 26, 98, __?

Count the squares in the matchstick puzzle below?