## Welcome to H3 Maths

Blog Support for Growing Mathematicians

## Posts tagged with prime factors

### Don’t be fooled by the Cowanumba!

September7

This (almost) mathematically puzzling picture shows an ordinary cow with two ear tags. Of course, you might be drawn to the number 7354 itself and be trying to work out its factors (you were trying to do that weren’t you?). Yes, there are two tags and the number 2 is one of the prime factors […]

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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)?]