135. The number 94857312, when multiplied by 6, gives 569143872, and all nine digits in each case are used once and only once.

[Two other solutions are known: \(89745321 \times 6=538471926\) and \(98745231 \times 6=592471386 .-M . \Gamma\).
135. Nine digits. If 32547891 is multiplied by 6, using each of the nine digits once and only once, the product is 195287346 (also containing nine digits, each used once and only once). Could you find another number that has the same property when multiplied by 6? Remember that each of the nine digits must appear once and only once in both the multiplicand and the product.