Question 4
The beavers draw pictures by scraping off the upper grey layer of coloured paper, as shown below.
The lower layer has red in the upper left, blue in the upper right, yellow in the lower left and white in the lower right.
| Position | Left | Right |
|---|---|---|
| Upper half | Red | Blue |
| Lower half | Yellow | White |
Which picture below reveals exactly three colours from the layer underneath?
The lower layer has red in the upper left, blue in the upper right, yellow in the lower left and white in the lower right.
| Position | Left | Right |
|---|---|---|
| Upper half | Red | Blue |
| Lower half | Yellow | White |
Which picture below reveals exactly three colours from the layer underneath?
