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Posts tagged with missing numbers

More Missing Number Squares

July14

Click on this Missing Number Square to create your own – at different levels of difficulty: Each number square contains a number of missing squares. Your task is to fill in the missing numbers.

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Be Like Prof Nash and find the Missing Numbers

May5

The sign below was taken at school camp this week (which may explain why there was not much activity on H3). This sign caught my attention as it has missing letters. We can try and work out what it is saying by trying missing consonants or missing vowels. We also know that the sign is […]

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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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