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A Tale of 21 Cities – H3 on Tour

November5

In what turned out to be a traveling whirlwind, H3 recently completed a world tour in 78 days. Here are the numbers: 13 flights, 5 trains, 3 cars, 1 bus 21 main cities, including: Auckland, San Fancisco, Seattle, London, Brussels, Rome, Florence, Venice, Trieste, Zagreb, Split, Hvar, Dubrovnick, Barcelona, Gibraltar, Lisbon, Montpellier, Cannes, Dubai, Perth, […]

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Secrets to Top Math Scores in Victoria, Australia

December14

“You have to have talent, and you have to be willing to work hard!” This sums up the high scores achieved recently by students in their state-wide math exams. A recent article highlights the underlying secret to high scores in senior school Mathematics, in the southern state of Victoria, Australia: “In Melbourne’s eastern suburbs, Vermont […]

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What’s Your Lucky Number?

March1

This installation of 99 animals drinking at a pool is part of the exhibition in Brisbane by Chinese contemporary artist Cai Guo-Qiang. There are 99 animals – an important number in Chinese culture. “No. 9 in Chinese culture means longevity and eternality. Thus, there were 9,999 rooms within the Forbidden City in Beijing. It is […]

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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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