There are 5 gift boxes of different sizes.
The red box is bigger than the white box.
The yellow box is bigger than the white box.
The black box is smaller than the red box.
The blue box is bigger than the yellow box but smaller than the black one.
Which box is the biggest?
Which box is the smallest?
(d) yellow < blue < black
(c) black < red
so red is biggest
(b) white < yellow
so white is smallest