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Posts tagged with whole numbers

The parking lot puzzle

June21

H3 Note: Give yourself about 30 sec to do this. Answer is in the Post Support

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Manjul Bhargava shares his love for Mathematics

January22

“India’s Math Genius Manjul Bhargava talks to NDTV (New Delhi Television) about his love for mathematics, and suggests that the teaching of math in India can be made fun and ‘less robotic’, using even magic tricks as teaching aids. He also touches on the mathematical nature of the tabla and other forms of music. NDTV: […]

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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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