This is as the term suggest a postage stamp pattern. It is made of four [ 2 x 2 grid ] squares. This pattern can appear in any of the four corners.
A pattern that covers four numbers in a postage stamp formation (a 2 x 2 grid) in any of the four corners.
A common bingo pattern. The pattern consists of marking off 4 numbers in a 2x2 grid in any of the 4 corners (similar to a postage stamp).
Matching four numbers to form a postage stamp (a 2 x 2 grid) in any of the four corners.
a type of pattern which consists in matching 4 numbers in a 2x2 grid in any corner.
A pattern of four numbers forming a 2 by 2 grid in any of the four corners.
You have to match four numbers in any of the four corners.