how many positive even integers less than 1000 can be made using the digits5,6,7 and8

How many positive even perfect cubes are less than 2008? 英语翻译How many 3-digit positive integers are odd and do not contain the digit 5? how many positive integers less than 1000 are not divisible by 3 How many positive integers greater then 5 and less than 500 are factors of 2004? How many four-digit positive integers are there with thousands digit 【GRE数学】How many positive integers less than 20 are equal to the sum of a positive multipleHow many positive integers less than 20 are equal to the sum of a positive multiple of 3 and a positive multiple of 选项：2;5;7;10;19 All the positive integers less than 49 are multiplied together.How many zeros will this product end in? How many 3-digit positive intergers are odd and do not contain the digit 怎么算?请指教 How many positive integers less than 1000 are multiples of 5 and are equal to 3 times an even integer? Of the two-digit positive integers less than 20 how many have different digits翻译翻译〜〜 求英语翻译For how many positive two-digit interger is the ones digit greater than twice the tens digit? how many positive even integers less than 1000 can be made using the digits5,6,7 and8 英语翻译how many five - digit positive integers,divisible by 9,can be written using only the digis 3 and 数学英语翻译 For how many positive intergers n does 根号n differ from 根号10 by less than AMC往年的题how many positive cubes divide 可我不明白是怎么来的…… Do me a favor.How many positive whole numbers less than 81 are NOT equal to squares of whole numbers?Positive whole number正整数squares平方我差不多已经被绕昏了 SAT reasoning test A positive integer is said to be tri-factorable if it is the product of three consecutive integers.How many positive integers less than 1,000 are tri-factorable? 首先：ordered pairs of positive integers 这里的有序是必须递增的么,就是说1,0不对0,1就对了?for how many ordered pairs of positive integers(x,y) is 2x+3y