Each guess is a calculation that fills all 6 boxes, such as 10×4−1.
Every guess must equal the target number.
Use BIDMAS: × and ÷ are worked out before + and −.
Green means the right character in the right place. Amber means it is in the answer but somewhere else. Grey means it is not in the answer.
Using exactly the same six tiles in a different order still counts, as long as it hits the target.
A new puzzle appears at midnight your time. It is good practice for the non-calculator papers in Cambridge IGCSE Mathematics (Papers 1 and 2) and Additional Mathematics (Paper 1).