How many numbers between 10 and 31 ( including 31 ) can be written using only the digits 1, 2 and 3 ? You can repeat digits.IKMC Grade 1 - 2
Câu hỏi liên quan
Stars, clovers, gifts and trees repeat regularly on a game board. Some juice was split on the board. As a result some pictures can’t be seen ( the ones that were in the white squares )
How many stars were on the board before the juice was split ?