Swathi.C

Monday, 27 January 2020

Today's Maths facts

The numbers on opposite sides of a dice always add up to seven

On a dice the numbers 1,2 and 3 all share a vertex. If these three numbers run clockwise round this vertex then the dice is called left-handed and if the three numbers run anti-clockwise round the vertex, then it is a right-handed dice. Chinese dice are normally left-handed and Western dice are normally right-handed.

Sergey Brin, co-founder of Google studied maths (and computer science) at university

Lots of tech entrepreneurs used maths to make their billions and Sergey Brin is no exception.

MATHS

William Shanks calculated pi to 707 decimal places but made a mistake on the 528th digit.

Amateur mathematicia William Shanks (1812-1882) spent a good part of his life calculating mathematical constants by hand. Shanks never found out about his mistake as it wasn’t revealed until after his death.

Maths facts

1.T word googol was made up by a 9-year old boy

In the 1930s an American Mathematician named Edward Kasner asked his nine-year old nephew Milton Sirotta to make up a word for him to use. Milton made up the world ‘googol’ which Edward Kasner later used to describe the number . The search engine Google was later named after the ‘googol’ meaning that Milton Sirotta had unwittingly helped name one of the world’s most famous companies.

2.There are only 17 possible types of wallpaper pattern

If you look at the underlying symmetry in a wallpaper pattern then mathematicians have shown that there are only 17 possibilities. You can of course vary the colours and decoration, but you will still only be left with 17 different possible symmetries.

MATHS FACTS TO BRIGHTEN UP A RAINY DAYS

1.Dividing by zero once put a US Navy Warship out of action.

In 1997 an unwitting crew member onboard the USS Yorktown wrongly entered a zero into one of the ships computers. This caused the ship’s software to divide by zero, meaning that it was stranded and unable to move for over two hours.

2. The number 0.999999….. is exactly equal to 1

Proof: Let x=0.9999…

Then 10x = 9.9999…

10x-x =(9.9999…)-(0.9999…)

9x=9

x=1

Friday, 3 January 2020

INTERESTING MATHS FACTS

Nature loves Fibonacci sequences

The spiral shapes of sunflowers and other patterns in nature follow a Fibonacci sequence, where adding the two preceding numbers in the sequence gives you the next (1, 1, 2, 3, 5, 8, etc.)

In a crowded room, two people probably share a birthday

It only takes 23 people to enter a room to give you an evens chance that two of them have the same birthday. With 75 people in the room the chances rise to 99 per cent!

Multiplying ones always gives you palindromic numbers

If you multiply 111,111,111 × 111,111,111 you get 12,345,678,987,654,321 - a palindrome number that reads the same forwards or backwards. And that works all the way back down to 11 x 11 (121) or just 1 x 1 (1).

Thursday, 2 January 2020

5 MATHS FACTS

1.The reason Americans call mathematics “math”, is because they argue that “mathematics” functions as a singular noun so ‘math’ should be singular too.

2. Markings on animal bones indicate that humans have been doing maths since around 30,000BC.

3. “Eleven plus two” is an anagram of “twelve plus one” which is pretty fitting as the answer to both equations is 13.

4. Also, there are 13 letters in both “eleven plus two” and “twelve plus one”.

5. Zero is not represented in Roman numerals.