How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

In the following series, a set of numbers is progressing with a particular pattern. Can you deduce that pattern and find the missing set?

(2 + 6), (21 + 6), (58 + 6), (119 + 6), ___

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?

It is a 5 letter word if you take away first letter it is something you get from sun, if you remove second letter you will get something to eat, if you remove third letter you get a word you use in pointing at and if you remove the fourth letter you get something to drink. What is it?

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

Can anyone tell me a word in the English dictionary which has a silent 'z'?