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Archive for February, 2016

Pythagoras surfs up a right-angled triangle

February26

Seen on the lake during a school day – 3 surfers making a right-angled triangle! Now, can you identify the hypotenuse (answer in the Post Support column)?

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Can you solve the fruit puzzle?

February18

Read Post Support for some clues. Hint: not all bananas are created equal!

Racing at 2 million kms/hr!

February11

Hundreds of galaxies hiding on the other side of the Milky Way have been discovered by an international team of scientists. They were able to see through the stars and dust of the Milky Way, into a previously unexplored region of space using the Parkes radio telescope in New South Wales, Australia. Despite being just […]

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Post Support

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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