Cage arithmetic
List the possible number sets for each cage, then cross them off.
For each cage, write down the sets of numbers that make the target. A 5+ cage with two cells in a 4×4 grid can be 1+4 or 2+3.
Subtraction and division cages always have two cells. A 3− cage in a 4×4 grid must be 1 and 4.
Multiplication cages are often the most informative because few sets work. 12× in two cells of a 4×4 grid must be 3 and 4.
Practise it
The Hint button on every puzzle explains the next step in the same plain language, so you can learn as you play. Play a Math Cages puzzle.