As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

There is a bag which have 21 blue balls and 23 red balls. You also have 22 red balls outside the bag. Randomly remove two balls from the bag. * If they are of different colors, put the blue one back in the bag. * If they are the same colour, take them out and put a red ball back in the bag. Repeat this until only one ball remains in the bag. What is the color of the sole ball left in the bag ?

I am 5 letters long.
My first two tell you who I am
My first 3 could be a medicine
My last three reversed could be a young boy.
My 4th, 3rd and 2nd in that order could be a fruit drink.
If you have me you may hang me round your neck
WHAT AM I ?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

How can one talk without saying a single word?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'