Echo , the dolphin

Echo, a dolphin is trying to jump through a circular hole in his enclosure to escape from the aquarium.
From echo's perspective just under the water surface, does the whole seem easier or harder to fit through ? and does it seem higher or lower ?
refractive index of water = nWater =1.33
refractive index of air = nAir =1.00

a) the whole looks harder to fit through than it actually will be
b) the whole looks easier to fit through than it actually will be
c) the hole looks higher than it actually is
d) the whole looks lower than it actually is 

jack and Jill

Two old friends, Jack and Bill
meet after a long time.
Jack: Hey, how are you man?
Bill: Not bad, got married and I have three kids now.Jack: That’s awesome. How old are they?
Bill: The product of their ages is 72 and the sum of their ages is the same as your birth date.
Jack: Cool… But I still don’t know.Bill: My eldest kid just started taking piano lessons.
Jack: Oh now I get it.
How old are Bill’s kids?

What could it be?

What is greater than God,
more evil than the devil,
the poor have it,
the rich need it,
and if you eat it, you'll die?

Some More Riddles!!!

1. You can't keep it until you give it.

2.How many of each species did Moses take with him on the ark?

3. Sometimes you like me, but usually not. I will give you some coins , so please give me a shot.

4. Which word in the dictionary is spelled incorrectly?

5. Feed me and I live, yet give me a drink and I die.

Riddling Riddles

1. Poor people have it. Rich people need it. If you eat it , you die. What is it?

2. If you don't keep me, I will break.

3. Take off my skin, I won't cry But you will. What am I?

4.What can travel around the world by staying in a corner?

5. The more there is , the less you see.

6. They come at night without being called and are lost in day without being stolen.

7. With pointed fangs I sit and wait; with piercing force I crunch out fate, grabbing victims, proclaiming might; physically joined with a single bite. What am I?

8. A man fell off a 30 foot ladder, but he didn't get hurt. Why not?

9. I went out on the jetty and got it, I sat down to seek it, I brought it home because I couldn't find it.

10. I have keys but no locks, I have space but no room, you can enter but you will have to escape. What am I?

Blindfold

You are wearing a blindfold and thick gloves. An infinite number of quarters are laid out on a table of infinite area. 20 of these quarters are tails and the rest are heads. How can you can split the quarters into 2 piles where the number of tails quarters is the same in each? You are allowed to move the quarters and to flip them, but you can never tell what state a quarter is currently in.

Holmes solves it easily...Can u??

During quite periods Sherlock Holmes always became restless. It was at these times that Doctor Watson tried to have a mental problem prepared for the great detective to solve. 'My nephew presented me with this problem,Holmes, said Watson.'Can you identify the next number in the following sequence of numbers: 1 3 2 6 1 1 5 7 2 4 2 8 3 3 4?'
Holmes solved the problem withput much energy. Can you dind out the answer? 

Mrs Hudson beats Holmes

Sherlock Holmes,  Doctor Watson and Mrs Hudson were all having a friendly game of cards in the study off 221b Baker Street.The stakes were npthing more than matches, but nevertheless,  it turned out to be Mrs. Hudson's night. She finished the evening with twice as manyatches as Holmes, while holmes ended up with three times as many as Watson. If the total number of matches are ninety - how many matches did they each won? 

3. A Locked Door

You have 100 bags of coins each with 100 coins, but only one of these bags has gold coins. The gold coin weighs 1.01 ounce and the other coins weighs 1 ounce. You also have a scale, but can only use it once. How can you identify the bag of gold coins?

 This should interest you. 

Strange killing

A girl, at the funeral of her mother, met a guy whom she did not know. She fell for him and just kept looking at him.Sometime later she realized that the guy is gone and she forgot to take the number of the guy and now she can't find him. A few days later she killed her elder brother.
Question: What is her motive in killing her brother ?

9. Robbery in a bank

The police rounded up Jim, Bud and Sam yesterday, because one of them was suspected of having robbed a bank. The three suspects made the following statements under intensive questioning: Jim: I’m innocent. Bud: I’m innocent. Sam: Bud is guilty. If only one of these statements is true, who robbed the bank?

8. Row, Row, Row Your Trees

How can seven trees be planted such that there are six rows of trees in straight lines consisting of three trees?

7. Brown Eyes and Red Eyes

There is an island of monks where everyone has either brown eyes or red eyes. Monks who have red eyes are cursed, and are supposed to commit suicide at midnight. However, no one ever talks about what color eyes they have, because the monks have a vow of silence. Thus, no one knows their own eye color; they can only see the eye colors of other people, and not mention them. Every day, the monks enjoy a silent brunch together at a round table. One day, a tourist visits the island monastery, and, unaware that he’s not supposed to talk about eyes, says “At least one of you has red eyes.” Having acquired this new information, something dramatic happens among the monks. What happens?

5. Globe Traversal

How many places are there on earth where one could walk one mile south, then one mile west, then one mile north and end up in the same spot? Assume the earth is a solid smooth sphere.

4. Glass Half Full

You are in an empty room with a transparent glass of water. The glass is a right cylinder and appears to be half full. How can you accurately figure out whether the glass is half full, more than half full, or less than half full? You have no rulers or writing utensils.

2. Cork, Bottle, Coin

You put a coin in an empty bottle and insert a cork in the bottle’s opening. How can you remove the coin without taking out the cork or breaking the bottle?

1. Burning Ropes

You are given two ropes and a lighter. Each of the two ropes has the following property: if you light one end of the rope, it will take exactly one hour to burn to the other end. It doesn’t necessarily burn at a uniform rate. How can you measure a period of 45 minutes?

Interesting and Funny riddles!!

Hey Here are some funny riddles you might want to solve and laugh at

#1.  Which is correct "The yolk of the egg is white" or "The egg yolk is white?"

#2.You bury me when I'm alive,
and dig me up only when I die.

#3.Sad, sick, or sloppy I'll help you out,
Use me right and I'll cover your snout.

What am I?
#4 Why don't mountains catch colds?

#5 What is the longest word in the dictionary?

Answers will be posted in the Answers section. 

YummY Pizza But tricky distribution

A  inch diameter round pizza has been sliced by  straight cuts, leaving a right triangle in the middle as shown here

The edge of the pizza has been cut into  arcs, one each of the following, in degrees, totaling  degrees

but not necessarily in that order. The maximum area, in square inches, this right triangle piece in the middle can have can be expressed as

where  are integers (which may be negative). Find

Integer  is positive. Do not rely on diagram to guess arcs in degrees.

WHAT!!!! you must be joking

Circle in a chess board

Consider an infinite chessboard, where the squares have side length of 1. The squares are colored black and white alternately. The (finite) radius of the largest circle whose circumference can be drawn completely on the white squares (hence you can see the entire circle) has the form , where  and  are integers,  and  are coprime, and  is not divisible by the square of any prime. What is the value of ?

Details and assumptions

 and  are all allowed to be 1. In particular, if you think the the largest radius is , then your answer to this should be .