Saturday, July 14, 2018
Math Post by BH.V.S.S.S.Vasu
Abundant Number - It is a number that is smaller than the sum of its proper divisors(aliquot parts).Twelve is the smallest abundant number- the sum of its aliquot parts is 1+2+3+4+6=16.Some other examples are 18,20,24 and 30.
Math Post by BH.V.S.S.S.Vasu
Indian astronomers used trigonometry to calculate the relative distances between the Earth and the Moon and the Earth and the Sun.They realised that,when the Moon is half full and directly opposite the Sun,then the Sun,Moon and Earth form a right angled triangle and were able to accurately measure the angle as (1/7)degrees.Their sine tables gave a ratio for the sides of such a triangle as 400:1, indicating that the Sun is 400 times away from the Earth than the Moon.
Friday, July 13, 2018
Math Post by BH.V.S.S.S.Vasu
12345679 X 9 = 111111111
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
Saturday, July 7, 2018
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