What is the mean, median, mode, and range of;
34, 28, 11, 42, 25, 12, 56

1. Order your numbers:
11, 12, 25, 28, 34, 42, 56

2. Mean is adding all of the numbers together and dividing that total by the amount of numbers:
11 + 12 + 25 + 28 + 34 + 42 + 56 = 208
208 / 7 = 29.7

3. Mode is a number that is repeated in a sequence of numbers:
There are no repeated numbers so there is NO mode

4. Range is the smallest number subtracted from the largest number of the sequence 
56 - 11 = 45

5. Median is simply the middle number in a sequence of ordered numbers:
So 28 would be your median.

Hope this is helpful!