Mathematics Facts & Trivia

Eleven A 3-digit result of any number multiplied by 11 has its middle digit the sum of other two, like: 21 × 11 = 231 (2+1=3)13 × 11 = 143 (1+3=4)44 × 11 = 484 (4+4=8) ... etc. Submitted by: Catrine Montano - Surigao, Philippines
Zero The value of zero was first used by the ancient Indian mathematician Aryabhata. Submitted by: Sundara Moorthy - Tiruppur, Tamil Nadu, India
Nine The sum of the digits of a number which is a multiple of 9 is always 9, ie, 45 : 4+5 = 9 1980 : 1+9+8+0=18 : 1+8 = 9214164 : 2+1+4+1+6+4=18 : 1+8 = 9etc.sciensational.com Submitted by: Vighneswar - India
Eight 9 × 9 + 7 = 88 98 × 9 + 6 = 888 987 × 9 + 5 = 8888 9876 × 9 + 4 = 88888 98765 × 9 + 3 = 888888 ... (Multiplication & Succession.) Submitted by: Tyler - United States
Heart equation The implicit curve equation (x2+y2-1)3-x2y3=0 produces the heart shape. Submitted by: Hyde - Toronto, Ontario, Canada
Googol The term Googol (10100, ie, 10 followed by 100 zeros) was invented by a 9-year old boy Milton Sirotta. Submitted by: Cynthia - San Francisco, California, United States
Reuleaux triangle The Reuleaux Triangle is a shape of constant width other than a circle. Submitted by: Adarsh - Guraon, India
1333 17 689 = 1332 177 6889 = 13332 1777 68889 = 13333217777 688889 = 1333332 ... sciensational.com Submitted by: Laxmana Perumal - Nagercoil, India
Millennium Prize The Seven Unsolved Millennium Prize Math Problems are:
1. P versus NP problem
2. Hodge Conjecture
3. Poincaré conjecture (solved in 2002)
4. Riemann Hypothesis
5. Yang-Mills Existence and Mass Gap
6. Navier-Stokes Existence and Smoothness
7. Birch and Swinnerton-Dyer Conjecture
Submitted by: Ravi - Mississauga, Ontario, Canada
Fibonacci tile The Fibonacci sequence are numbers where each following number is the sum of the previous two:0 1 1 2 3 5 8 13 21 34 55 89 ... Submitted by: Matt - California, United States
Palindrome Number 13431 A Palindrome Number is a number that reads the same backwards and forward, e.g. 13431. Submitted by: Yusuf - Victoria, Australia
Dollar in change 293 A US dollar can be made into small change in 293 ways.
Pi You can remember the value of Pi (3.1415926) by counting each word's letters in "May I have a large container of coffee?"sciensational.com
Multiply 1 × 8 + 1 = 9 12 × 8 + 2 = 98 123 × 8 + 3 = 987 1234 × 8 + 4 = 9876 12345 × 8 + 5 = 98765123456 × 8 + 6 = 987654 ... (Multiplication & Succession.) Submitted by: Moi, Canada.
142857 142857 is a cyclic number, i.e., its digits are rotated around when multiplied by any number from 1 to 6. Like this: 142857 × 1 = 142857 142857 × 5 = 7 14285 142857 × 4 = 57 1428 142857 × 6 = 857 142 142857 × 2 = 2857 14 142857 × 3 = 42857 1 Submitted by: Moi, Canada.
1089 9801 1089 multiplied by 9 gives an exact reverse: 9801.
One Thousand From 0 to 1000, the letter "A" only appears in 1000 ("one thousand"). Submitted by: Ramil Argete
Two 2 is called the "oddest" Even-Prime number. 2 is a unique Even-Prime because while all Evens are divisible by 2, any number apart from 2 that is divisible by 2, is not a Prime.sciensational.com
1111 1 × 9 + 2 = 11 12 × 9 + 3 = 111 123 × 9 + 4 = 1111 1234 × 9 + 5 = 11111 12345 × 9 + 6 = 111111 ... (Multiplication & Succession.)
Forty 40 when written "forty" is the only number with letters in alphabetical order, while "one" is the only one with letters in reverse order.