1 to 100 of Prime Numbers 2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97. The number 15 has divisors of 1,3,5,15 because: 15/1=15 15/3=5 15/5=3 15/15=1 So 15 is not a prime number. The number 13 has only two divisors of 1,13. 13/1=13 13/13=1 So 13 is a prime number.
You have to find the difference in height between both checkpoints. To do this just calculate 196 - 52. Checkpoint 5 is 144 (meters?) higher than Checkpoint 2.
