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?