一道英文数学题,不会啊!

题目

一道英文数学题,不会啊!
1. the average of one group of number is 4, A second group contains twice as many numbers and has an average of 10,The average of both groups of numbers combined is______?
2. A number is less than 2008,It is odd it leaves a remainder of 2 when divided by 3 and a remainder of4 when divided by 5,What is the sum of the digits of the largest such number?
这两题怎样做啊,不懂.
而且请顺便告诉我,这类的题算属于那种题型啊,因为想练习一下啊哈哈,大家帮帮忙啊

答案

1 8
2 1994
我看这种题就是考翻译,题弄懂了就做出来了.