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Posts tagged with tablet

An ancient tablet that demonstrates undoubted genius

August25

For nearly 100 years, the mysterious tablet above (no, it’s not an iPad) has been referred to as Plimpton 322. It was first discovered in Iraq in the early 1900s by Edgar Banks, the American archaeologist on which the character Indiana Jones is thought to have been largely based. Now researchers from the University of […]

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Take one tablet a day to become a better mathematician

September7

This is an ancient clay tablet (aka school book)¬†discovered in Babylonia in the second millennium B.C. – some 1000 years before Pythagoras. You will notice that is shows, within the square, an isosceles triangle with a diagonal hypotenuse. The Babylonians¬†understood the relationship between the sides of a right-angled triangle, and, in solving for the hypotenuse, […]

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10 x 9 x 8 + (7 + 6) x 5 x 4 x (3 + 2) x 1 = 2020

NCEA Level 2 Algebra Problem. Using the information given, the shaded area = 9, that is:
y(y-8) = 9 –> y.y – 8y – 9 =0
–> (y-9)(y+1) = 0, therefore y = 9 (can’t have a distance of – 1 for the other solution for y)
Using the top and bottom of the rectangle,
x = (y-8)(y+2) = (9-8)(9+2) = 11
but, the left side = (x-4) = 11-4 = 7, but rhs = y+? = 9+?, which is greater than the value of the opp. side??
[I think that the left had side was a mistake and should have read (x+4)?]

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