Mathematical advancement in India under Chandela Rajput rule. This inscription on the entrance of one of the Khajuraho temples is anything but ordinary, it is world's first 4x4 magic squares called Chautisa.
The extraordinary thing about this 4x4 magic square inscribed in mid 10th century is that, all 1 to 16 numbers are arranged in such way that every number comes only once and the sum of all the horizontal lines is 34 and so is sum of all the vertical lines.
Above that both the diagonal also sums equal to 34. All 4 mini squares on the corner equals to 34 and also the square in the middle. Now the similar magic square was created in the Europe more than 5 centuries later by a German named Albrecht Dürer, which
by the way was still inferior to Khajuraho's magic square as Khajuraho's magic square has one more property which Dürer's square lacked that is even the broken diagonal in Khajuraho's Chautisa equal to 34 which was not the case with german one even though,
it was created more than 5 centuries later. See for example 12+8+5+(next number from the last line i.e. 9) = 34. Same for all half squares on either side, eg 12+1+6+15=34.
This inscription also give definite proof of the one of the first use of the modern numeral system the so called Hindu-Arabic numerals which should have been called Hindu numerals, arabs had no part in inventing it, they just spread it to the west from India.
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