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)...
The value of zero was first used by the ancient Indian mathematician Aryabhata.
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 = 9 214164 : 2+1+4+1+6+4=18 : 1+8 = 9
9 × 9 + 7 = 8898 × 9 + 6 = 888987 × 9 + 5 = 88889876 × 9 + 4 = 8888898765 × 9 + 3 = 888888... (Multiplication & Succession.)
The implicit curve equation (x2+y2-1)3-x2y3=0 produces the heart shape.
The term Googol (10100, ie, 10 followed by 100 zeros) was invented by a 9-year old boy Milton Sirotta.
The Reuleaux Triangle is a shape of constant widthother than a circle.
17 689 = 1332177 6889 = 133321777 68889 = 13333217777 688889 = 1333332...
The Seven Unsolved 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
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 ...
A Palindrome Number is a number that reads the same backwards and forward, e.g. 13431.
A US dollar can be made into small change in 293 ways.
Source: Sciensational.com
https://www.sciensational.com/maths.html
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