80 has 5 factor pairs.
All of the composite numbers less than 100 have factor pairs.
7
Split 100 into factor pairs. So we have: 100 x 1 50 x 2 25 x 4 20 x 5 10 x 10
Pick any two consecutive numbers in that range.
The 15 twin prime numbers between 1 and 100 are in 8 pairs. The twin prime pairs are (3, 5), (5, 7), (11, 13), (17, 19), (29, 31), (41, 43), (59, 61), and (71, 73).
All of the composite numbers less than 100 have factor pairs.
7
80 has 5 factor pairs.
60, 72, 84, 90 and 96 have 6 factor pairs.
(1,100) (10,10)
100 and 7
Since one dollar is one hundred pennies, the multiplication sentences for 100 would be the same in both cases.
Split 100 into factor pairs. So we have: 100 x 1 50 x 2 25 x 4 20 x 5 10 x 10
1 The factor pairs of 100 are 1 and 100, 2 and 50, 4 and 25, 5 and 20, and 10 and 10. The factor pairs of 49 are 1 and 49, and 7 and 7. Since the only factor they share is 1, 1 is their greatest common factor.
Pick any two consecutive numbers in that range.
3,5 5,7 11,13 17,19 29,31 41,43 59,61 71,73
Pick any two consecutive numbers in that range.