Foundation June 2017 Paper 2 Q16
16. Boris has made this pattern out of black and white squares.
Boris has to add more squares to make a new pattern.
He has to use the smallest possible number of extra squares.
\(\dfrac{2}{5}\) of the new pattern is black.
How many black squares and white squares will there be in the new pattern? [2]
Black squares ……………… White squares ………………
| Scheme | Marks | Comments |
|---|---|---|
| 4 black and 6 white | B2 | B1 for attempt at diagram showing 10 squares or for black/white reversed or for showing equivalent fractions e.g. 4/10 and 6/10. OR B1 for black : white = \(2n : 3n\), where \(n > 2\) e.g. 6 black and 9 white. |
| (2) |