SKDUPJ

Amazing facts in mathematics….ingredients for improving learning.
Among all shapes with the same area Circle has the shortest perimeter.
In a group of 23 people, at least two have the same birthday with the probability greater than 1/2 .
Among all shapes with the same perimeter a Circle has the largest area.
12+3-4+5+67+8+9=100 and there exists at least one other representation of 100 with 9 digits in the right order and math operations in between.
There are just five regular polyhedra.
Pi=3.14159 26535 89793 23846 26433 83279 50288 41971 69399 37510 58209 74944 59230 78164 06286 20899 86280 34825 34211 70679 82148 08651 32823
12345679 x 18 = 222222222
12345679 x 27 = 333333333
12345679 x 36 = 444444444
12345679 x 45 = 555555555
12345679 x 54 = 666666666
12345679 x 63 = 777777777
12345679 x 72 = 888888888
12345679 x 81 = 999999999
332 = 1089
3332 = 110889
33332 = 11108889
333332 = 1111088889
3333332 = 111110888889
88 = 9x9 + 7
888 = 98x9+6
8888 = 987x9+5
88888 = 9876x9+4
888888 = 98765x9+3
8888888 = 987654x9+2
88888888 = 9876543x9+1
1729 is the Ramanujan’s number. When the great Indian mathematician was lying ill in the hospital, Dr. Hardy came to visit him. He said ,the taxi number 1729, in which he came is a boring number.Suddenly Ramanujan’s face lit up & he said , it is not a boring number. It is the only number that is the sum of 2 cubes in two different ways.
10^3 + 9^3 = 1729 & 12^3 + 1^3 = 1729.