Double Your Money

What coin doubles in value when half is deducted?

3 Bags of Marbles

You have three bags, each containing two marbles. Bag #1 contains two white marbles, bag #2 contains two black marbles, and bag #3 contains one white marble and one black marble.

You pick a random bag and take out one marble. Given that this is a white marble, what is the probability that the remaining marble from the same bag is also white?

Up to 100

Use the numbers 123456789 so that the equation is equal to 100. The numbers must stay in the same order. You can use addition, subtraction, multiplication, and division. Remember, they have to stay in the same order.

Light Up the Night

Hibernating when it is cold,
But when it is warm I become bold;
I light up the night,
For every child`s delight.
Some people I might annoy
But to others I bring joy.

 What am I?






Note, I find this riddle to be pretty vague.  I wouldn't be surprised to find multiple answers are possible.

Not a Plant

Though not a plant, Has leaves. Though not a beast, Has spine. Though many wouldn't need this thing 'Tis more valuable than wine. What is it?

Stars Awash in a Sheen of Light

Stars awash in a sheen of light
It calls out loud in vile delight.
Listeners endure in fright.
Vicious brute that reigns at night,
Evil whelped of heinous bite,
Renewed by wax, it regains might.

A leading way to slay the beast,
Get the hidden weapon thus released.





Got this one and a couple of others from dan hersam.  The answer is there if you can't wait for someone to post it here.

Flower by any Other Name Becomes a Country

What flower becomes the name of any country by removing the first letter, becomes the name of a city when the last letter is removed and becomes the name of a bird if both first and last letters are removed?