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

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

Why is it very easy to weigh a fish?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

Replace the question mark in the picture below.

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

I am green and found in the forest and have needles instead of leaves. What am I?
Hint 1: It can be used for Christmas decorations.
Hint 2: I have a strong, scent that is used in air fresheners.

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?

What four weights can be used to balance from 1 to 30 pounds?

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

No matter how little or how much you use me, you change me every month. What am I?