Of the two-digit positive integers less than 20 how many have different digits翻译翻译〜〜

From the list of two-digit prime numbers, two-digit 英语翻译in a two-digit number,the units digit is greater than the tens digit by 3 If tens digit and the units digit of the number are interchanged,the sum of the number obtained and the original number is 121.FIND THE TWO NUMBERS what two digit whole number is twice the product of its digits? 各位大虾请教一道英语数学题SAT if n is a two-digit number whose units digit is 4 times its tensif n is a two-digit number whose units digit is 4 times its tens digit,which of the following statements must be true?A.n is a multiple of 4B.n 求英语翻译For how many positive two-digit interger is the ones digit greater than twice the tens digit? Of the two-digit positive integers less than 20 how many have different digits翻译翻译〜〜 Of the three-digit integers greater than 700 ,how many have two digits that are equal to each other and the remaining digit different from the other two?a/ 90b/ 82c/ 80d/ 45e/ 36 the sum of the digits of two number is 12.the tens digits is twice the unit digit.find the number T is the ten digits of a two-digit positive integerGRE的mathematics conventions有个例子是“T is the tens digits of a two–digit positive integer,so T is an integer from 1 to 9”,我不太明白前半句话的意思,a two–digit positive int m is two digit number and 2m is a three digit number,what is the unit digit of mRT是GMAT的数学题1.the unit number of 2m is 42.the unit number of m is the same as the tens number of 2m the value of the units digit in 6^47 name the place value of the digit 3 The value of the unit'digit in 6^47The value of the unit'digit in 5^77 sat数学.题目看不懂..Tim wrote a seven-digit phone number on a piece of paper.He later tore the paper accidentally and the last two digit were lost．What is the maximum number of arrangements of two digits,using the digits 0 through 9,that he mr.meek has a new phone numder and he loves it because the extension（last four digits)has the middle two digits the same,just like his namethe repeated digit also happens to be the same as the first digit of mr.humdle's new extensionand the first d 请问 find the number two-digit positive integer whose digits total 如何翻译? Should be the state name or a two digit state code.怎么填写