## Eggs-cellent Riddles & Brain Teasers

You always knew that eggs are full of nutrition but here on QuickerMaths, it will help you strengthen your brain cells too. Here are some riddles & puzzles around eggs for you to solve.

First Egg Riddle

If one and a half hens lay one and a half eggs in one and a half days, how many eggs does one hen lay in one day?

Second Egg Riddle

2 fathers and 2 sons sat on the table to eat eggs for breakfast. They ate exactly three eggs, each person had an egg. Now you need to explain how that’s possible?

Third Egg Riddle

Let say you started selling a basket of eggs.

First customer buys one-half of your eggs plus one-half of an egg. Second customer buys one-half of your eggs plus one-half of an egg.

Third customer buys one-half of your eggs plus one half an egg.

At this point you have sold all of your eggs, and you never broke an egg. How many eggs did you start with?

## How to Develop Effective Thinking through Puzzles

While going through an online course on EDX (Massive Open Online Courses) named Effective Thinking through Mathematics with Professor Michael Starbird, I came across couple of interesting puzzles. This course basically talks about how one can improve his thinking and make it very effective using mathematical reasoning in decision making. I am sharing those with you here in this post.

## Puzzle 1: Gem in the Stone

Here are nine identical-looking stones. One can’t differentiate any one from the others. Eight of the stones weigh the same, but one of the stone containing the jewel weighs slightly more than the others

For your help you have got 2 balance scales. You may use each of the two balance scales exactly once. Is it possible for you to select the slightly heavier stone containing the gem (jewel) from among the nine identical-looking stones? Explain why or why not.

## Imagine you are in a room with 3 switches

IQ Test

Imagine you are in a big house and you need to match out the 3 switches located in the first floor with the three light bulbs located in the ground floor. In the ground floor there are 3 bulbs (all are off at the moment), each switch belongs to some bulb.

Question

How can you find out, which switch belongs to which bulb?

Other conditions

It is impossible to see from one room to another. Read More

## So You Think You Are Clever?

Here is quiz that is likely to engross you mentally for some time. Ponder on each one of them very carefully. At the end of it you might realize, how clever you are (or you are not). If you can answer 5 or more than that correct, I consider you exceptional.

1. If 3 cats kill 3 rats in 3 minutes, how long will it take 100 cats to kill 100 rats?
2. Is it legal for a man to marry his widow’s sister?
3. A monkey is at the bottom of a 30-foot well. Each day he jumps up 3 feet and slips back two. At that rate when will the monkey reach the top of the well?
4. I have 2 minutes to catch a train and 2 Km to go. If I go the first Km at the rate of 30 Km per hour, at what rate must I go the second Km in order to catch the train?
5. The number of eggs in a basket doubles every minute. The basket is full of eggs in an hour. When was the basket hall full?
6. What is the smallest number of ducks that could swim in this formation: two ducks in front of a duck, two ducks behind a duck and a duck between two ducks?
7. A boat will carry only 200 pounds. How a man weighing 200 pounds and his two sons, each of whom weighs 100 pounds, use it to cross a river?

Online masters degree programs are available for those who want to learn advanced math skills.

## A man on a park bench

Find below two family relationship puzzles. To answer these questions, one needs to understand the way words are used or rather twisted in the given questions.

A man on a park bench is looking at a small portrait. You ask him, Who is that in the picture?
The man says, Brothers and sisters, I have none, but that man’s father, is my father’s son.
Can you tell what person is in the picture?

A beggar’s brother died, but the man who died had no brother. How could this be?

## Sheikh’s Heritage

This is a simple yet interesting puzzle for you. It might appear to be a little tricky at the beginning but some amount of out-of-the-box thinking can help you to answer it in a jiffy.  So here you go –

How to get the heritage?

An Arab sheikh tells his two sons to race their camels to a distant city to see who will inherit his fortune. The one whose camel is slower will win. The brothers, after wandering aimlessly for days, ask a wise man for advise. After hearing the advice they jump on the camels and race as fast as they can to the city. What does the wise man say?

## Mathematical Symbols Puzzles

We all come across many mathematical or numerical puzzles, which are based on the usage of mathematical symbols or notations. At times such puzzles can even be solved by changing the way things are written.

In this post I am presenting 3 such interesting puzzles. Keen observation and simple application of logic is required to solve them. So here you go –

1. Make this equation valid with single stroke of pen (i.e. just by adding a line somewhere): 5+5+5 = 550
2. Make 120 using 5 zeros. You can use any mathematical notation/symbol
3. What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller

## Turn of the Century Puzzle

Your grandfather, determined to start the year 1900 off right, went to bed at 7 p.m. on December 31, 1899, setting his alarm clock to wake him at 8 the next morning. He slept like a log. How many hours sleep did he get?

## Ancient Coin Puzzle

A thief went to a shop that sold antique coins. He stole a coin from Emperor Alexander’s time that had 326 B.C. inscribed on it. These rare coins were worth \$ 100 for every year of their age (years from date of minting till now). So how much did the thief get for his stolen coin?

Both the puzzles above have some similarity. There is a clue hidden in the title of the post itself.

## Solve the Mystery of Missing Dollar

### Missing Dollar Riddle

Three friends check into a hotel. They pay \$30 to the manager and go to their room. The manager suddenly remembers that the room rate is \$25 and gives \$5 to the bellboy to return to the people.  On the way to the room the bellboy reasons that \$5 would be difficult to share among three people so he pockets \$2 and gives \$1 to each person. Now each person paid \$10 and got back \$1. So they paid £9 each, totalling \$27. The bellboy has \$2, totalling \$29.