Maths Challenge consists of cool math games, which really challenge your logical skills. It is essentially a math playground.

The Universal Mind Reader, for instance, can guess any number that you think of - between 1 and 63: it is a cool math game; it is simple, yet cool enough to be one of the great math games. After showing 6 cards that ask some simple questions, it will guess the number you guess.

In addition, there is a programme to test your algebraic skills in a subtle way. The Versatile Mind Reader just does it, by giving you the opportunity to guess a number between 1 and 20.

There are a few other games that make you think through math; all in all, you will not be disappointed for visiting this page - and playing around with the contents.

Turn the **triangle of coins** upside down by dragging the coins - with just **3** moves .

The Code Book: The Secret History of Codes and Code-breaking

- Use four 9's - once and only once - to make 100.
- Use four 5's - once and only once - to make 100.
- Use four 7's - once and only once - to make 100.
- Use digits 1-9 - once and only once - to make 100.
- Find 1001
^{2}- 999^{2}with just two steps. - Forty five is a peculiar number: you can divide it into four parts, say A, B, C and D, in such a way that A*2 = B/2 = C-2 = D+2. What are A, B, C and D?
- I have written a two-digit number on a piece of paper. It is equal to five times the sum of its two digits. If I add nine to the number, the two digits swap their positions around. What is the number?
- There are 12 boys in a group. If they stand up in a line, in how many ways can they be arranged so that the tallest and the shortest always stand together?

The answers are at the end of the page. Please use them as a last resort.

Think of a number (1-20) - make sure you remember it.

Multiply it by 2; then click this

Divide your answer by 2; then click this

Now, take away your original number from the answer.

Move the mouse over the image - after making your effort, of course!

The Man Who Knew Infinity: A Life of the Genius Ramanujan by Kanigel, Robert (1992) Paperback

Maths Quest: The Museum of Mysteries

- Think of a 3-digit number.
- Add the 3 digits and take the answer away from the original number.
- Cross out any digit in the answer, and write down the remaining two in the following box and click the button.

The unexpected findings of a dead member of the National Pigeon Service of the Royal Air Force - a unit of 250,000 trained pigeons during the Second World War as messengers – which was found stuck inside a chimney in a home in Surrey by the owner of the house while he was renovating the fireplace, is reviving the interest in the ingenious communication technique worldwide, that had been widely used in the past.

David Martin, the man from Surrey, England, found the ‘scroll’ inside a small, red, plastic cylinder, which had been attached to a leg of the bird. Although, only the skeletal remains of the bird are visible, the container has managed to keep the message intact for more than six decades, despite being enveloped in soot and dust in equal proportion.

By strange coincidence, the message consists only of 143 characters –3 more than the length of a Twitter message: there are 27 5-letter words, arranged in 7 rows; the last two words have numbers and a back-stroke.

It has not been deciphered yet; so it is your chance to have a crack at it!

David Martin, the man from Surrey, England, found the ‘scroll’ inside a small, red, plastic cylinder, which had been attached to a leg of the bird. Although, only the skeletal remains of the bird are visible, the container has managed to keep the message intact for more than six decades, despite being enveloped in soot and dust in equal proportion.

By strange coincidence, the message consists only of 143 characters –3 more than the length of a Twitter message: there are 27 5-letter words, arranged in 7 rows; the last two words have numbers and a back-stroke.

It has not been deciphered yet; so it is your chance to have a crack at it!

Math Hysteria: Fun and games with mathematics

Three jealous husbands,travelling with their wives, suddenly found themselves near a stream.

They have to cross the stream by boat and only two can go in the boat at any time.

Each of the husbands does not want his wife travel with either of the other men, unless he himself is present, for obvious reasons.

How do they solve this problem amicably and cross the stream by boat?

They have to cross the stream by boat and only two can go in the boat at any time.

Each of the husbands does not want his wife travel with either of the other men, unless he himself is present, for obvious reasons.

How do they solve this problem amicably and cross the stream by boat?

Hannah and Sarah in a guessing game Hannah is blindfolded; however, it doesn't stop her from guessing correctly the three numbers on the dice appeared at random, when Sarah answers the series of questions put to her. You can impress the friends too with this simple game - by not necessarily blindfolding them, but by pulling wool over their eyes! Give it a go in the name of maths! Please follow the three simple steps:

- Multiply the first number by 2 and add 5.
- Multiply the result by 5 and add the second number.
- Multiply the result by 10 and add the third number.
- Take away 250 from the result.
- The answer has the three numbers on the dice.

Click this to open up the IQ Test

Answers for Number Challenges - - move the mouse here

1) 99 9/9

2) (5+5)7/0.7(5+5)

3) 7/0.7 * 7/0.7

4) 6 x 9 - 7 x 8 + 3 + 4 x 25 - 1

5) 4000

6) A = 5, B = 20, C = 12, D = 8

7) 45

8) 2*11!

Maths is challenging; so is finding the right book. K A Stroud, in this book, cleverly managed to make all the major topics crystal clear with plenty of examples; popularity of the book speak for itself - 7^{th} edition in print.