13,31,17,71,37,73,79,97 :)
Chat with our AI personalities
101
100. The only multiple of 100 from 1 to 100 is 100.
Taking all the extreme numbers between 1 and 100 in each sum gives 1 + 100, 2 + 99, 3 + 98... and so on - fifty pairs of sums which add to 101. Therefore, the sum of the integers between 1 and 100 is equal to 50 x 101 = 5050.
12,18,24,30,36,42,48,54,60,66,72,78,84,90,96
4, 9, 25, and 49 are all of the numbers between 1 and 100 having 3 factors.