The doctor prescribed you to take one pill from the bottle every half an hour. The bottle is now left with only three pills.

How long do you think you have before you run out of pills?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

Why do people go to bed?

Why is Saturday stronger than Monday?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

If 21x = 79x, what is the value of x?

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

What kind of tree can you carry in your hand?

A California farmer owns a beautiful pear tree. He supplies the fruit to a nearby grocery store. The store owner calls the farmer to see how much fruit is available for him to buy. The farmer knows the main trunk has 24 branches. Each branch has exactly 12 boughs and each bough has exactly 6 twigs. Since each twig bears one piece of fruit, how many plums will the farmer be able to deliver?