What number comes next in this sequence:
7 8 5 5 3 4 4 _

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

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.

A landlord calls both of his sons and tells them that their horses will now decide who will transfer the inheritance. He tells them to race along the land till the end and the one whose horse will be slower will win and be the heir to all the property.

Both of them keep wandering for days but to no result. Then they ask a wise man regarding it. The man advises them on the matter after which they jump on the horses and race as fast as they can till the end. Why did they do it?

What did the wise man say?

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

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

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

Replace the question mark with the number below given a simple math problem.

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

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