I do not need working out for these, just answers please. The sooner the better, thank you so much:)

How many integers between 10000 and 99999 (5 digits), contain only the digits 1,2,3,4,5,7,8 and 9, and no digit appears twice?How man).r integers between 100 and 999 {3 digits), contain only the digits 1,2,4,5 and B, and no digit appears twice? How many 6 letter words can you make from the letters A,B,C, D,E,F,G, H and I, where letters cannot be repeated and are in alphabetical order?How many 6 letter words can you make from the letters A, B,C, D,E,F,G and H?How many 10 letter words can you make from the letters A and B?How many integers between 10000 and 99999 (5 digits), without repeated digits, contain only the digits 1,2,3,4,5,6,7,8 and 9 and the digits appear only once each, and in increasing order?\fHow many integer solutions are there to the equation: cite2 + 3 + 4 + 25 + 26 = 16