What occurs twice in a week, once in a year but never in a day?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

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?

How many times in a given day, minutes and hour clock comes in a straight line ?

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

How do you go from 98 to 720 using just one letter?

Find the missing number in the sequence below:

An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

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), ___