Problems emphasized, "integer", it means that there is every main value position certainly
. The numbers in the hundred thousand are available with all 9 one
. The number of all available 9 (count 0, but don't count that apply to one hundred thousand)
.The number in the thousands available all 9 - 1 = 8. (problem that use a number unique to each main)
. The number in the hundreds of all available 8 - 1 = 7 one
. The number in the tens of all available 7 - 1 = 6 one
. The number of digit all the available 6 - 1 = 5 one
.That is to create the conditions such 9x9x8x7x6x5 integer = = 136 080, number.
การแปล กรุณารอสักครู่..
