Average. (42+43)/2 = 42.5 Come on.
42 is composite, 43 is prime.
21 with 1 remaining 43 - 1 = 42 = 2 x 21
There are infinitely many pairs of positive integers that satisfy the equation x - y = 42, starting with (43, 1), (44, 2), (45, 3) and so on.
43 + 42 = 64 + 16 = 80
5x + 43 = 42 5x = -1 x = -1/5 Check it. -2 + 43 + 1 = 42 42 = 42 Check.
Average. (42+43)/2 = 42.5 Come on.
42 is composite, 43 is prime.
21 with 1 remaining 43 - 1 = 42 = 2 x 21
41: 1, 41 42: 1, 2, 3, 6, 7, 14, 21, 42 43: 1, 43 44: 1, 2, 4, 11, 22, 44 45: 1, 3, 5, 9, 15, 45 46: 1, 2, 23, 46 47: 1, 47 41: 41 42: 2, 3, 7 43: 43 44: 2, 11 45: 3, 5 46: 2, 23 47: 47
algebraic expressions
43, 1806
The factors of 42 are: 1, 2, 3, 6, 7, 14, 21, 42 The factors of 86 are: 1, 2, 43, 86 The common factors are: 1, 2
40: 1, 2, 4, 5, 8, 10, 20, 40 41: 1, 41 42: 1, 2, 3, 6, 7, 14, 21, 42 43: 1, 43 44: 1, 2, 4, 11, 22, 44 45: 1, 3, 5, 9, 15, 45
39: 1, 3, 13, 39 40: 1, 2, 4, 5, 8, 10, 20, 40 42: 1, 2, 3, 6, 7, 14, 21, 42 43: 1, 43 44: 1, 2, 4, 11, 22, 44 45: 1, 3, 5, 9, 15, 45
43 and 1 have. There are an infinite number of other correct answers.
(43*42*41*40*39)/(5*4*3*2*1) = 962598