#2131 - What Word Riddle
Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and gray,
I am read from both ends,
And the same either way.
Eye
#2132 - Simple Maths Puzzle
In a certain country ½ of 5 = 3. If the same proportion holds, what is the value of 1/3 of 10 ?
4
5/2 = 3 and 10/3 = x
(10/3)/(5/2) = 20/15 = 4/3
So x/3 = 4/3
x=4
#2133 - Science Series Puzzle
H, Be, F, S, Mn, Kr, In, Gd, Tl, ?
What's the next in the series?
Fm.
These are the chemical elements whose atomic numbers are perfect squares.
1, 4, 9, 16, 25, 36, 49, 64, 81, 100.
#2134 - Hard Probability puzzle
Three people enter a room and have a green or blue hat placed on their head. They cannot see their own hat, but can see the other hats.
The color of each hat is purely random. They could all be green, or blue, or any combination of green and blue.
They need to guess their own hat color by writing it on a piece of paper, or they can write 'pass'.
They cannot communicate with each other in any way once the game starts. But they can have a strategy meeting before the game.
If at least one of them guesses correctly they win $50,000 each, but if anyone guess incorrectly they all get nothing.
What is the best strategy?
Simple strategy: Elect one person to be the guesser, the other two pass. The guesser chooses randomly 'green' or 'blue'. This gives them a 50% chance of winning.
Better strategy: If you see two blue or two green hats, then write down the opposite color, otherwise write down 'pass'.
It works like this ('-' means 'pass'):
Hats: GGG, Guess: BBB, Result: Lose
Hats: GGB, Guess: --B, Result: Win
Hats: GBG, Guess: -B-, Result: Win
Hats: GBB, Guess: G--, Result: Win
Hats: BGG, Guess: B--, Result: Win
Hats: BGB, Guess: -G-, Result: Win
Hats: BBG, Guess: --G, Result: Win
Hats: BBB, Guess: GGG, Result: Lose
Result: 75% chance of winning!
#2135 - Poem Puzzle
I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth I am dissolved into air. What am I?
Smoke
#2136 - Simple Math Puzzle
At my favorite fruit stand,
an orange costs 18¢,
a pineapple costs 27¢,
and a grape costs 15¢.
Using the same logic, can you tell how much a mango costs?
15¢ The cost is equal to 3¢ for each letter in the fruits name.
#2137 - Nothing Riddle
I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?
A Hole
#2140 - Youngest Age Puzzle
Kareena is older than Katrina and younger than Karishma. Isabelle is younger than Bipasha and Karishma. Bipasha is older than Karishma. If Kareena and Isabelle are the same age, who's youngest?
Katrina is the youngest