I'm not sure of the other three, but I know that mode means the one that appears the most often, so for example, if you saw this number sequence...
4,4,5,5,6,6,6,3,3,1, 6 would be the mode, simply because it appears the most often.
median= 4&3 range=3 mode= no mode
Mean: 71 Median: 67.5 Mode: None Range: 28
Mean: 4.2 Median: 2 Mode: 1 Range: 8
Prior to the introduction of 170, the mean, median, mode and range did not exist since there were no numbers at all. Once 170 is introduced, it becomes the mean, median and mode. The range is zero.
The mean and the median of the two numbers, 12107 and 1115 are 6611.There is no mode. The range is 10992.
What is the answer
The mean, median and mode of a single number is the number itself. The range is 0.
Mean: 16 Median: 17 Mode: 13 Range: 6
Mean: 4.2 Median: 2 Mode: 1 Range: 8
range
mean= 2, mode= 1 and 3, median= 3, and range= 2
Range: 25 Mean: 10 Median: 11 Mode: 11, 1