(57-42) (24-23) = 15 x 1 = 15. See discussion page.
There are many possible answers. One possible rule is: Un = (3n4 - 18n3 + 69n2 - 54n + 120)/8 for n 1, 2, 3, ...
42: 1, 2, 3, 6, 7, 14, 21, 42.60: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60.
42 x 2 = 84
(8-2)2+(-4-15)2 = 397 and the square root of this is the distance which is 19.925 rounded to 3 decimal places
multiplication pattern
42 123 243
Including 2 and 42 there are 15 which are:- 2 12 20 21 22 23 24 25 26 27 28 29 32 and 42
Halfway between 42 and 82 is (42 + 82) ÷ 2 = 124 ÷ 2 = 62.
2/5, 2/9, 2/12, 2/15, 2/42
2 with remainder 15.
42
Factors of 15: 1, 3, 5, 15. Factors of 42: 1, 2, 3, 6, 7, 14, 21, 42. GCF (15, 42) = 3
122, because it goes x2 then -1 and repeats
Half way between 36 and 42 is (36 + 42) ÷ 2 = 39.
Start at 1. Multiply by 3. Subtract 1. Multiply by 3. Subtract 1. Repeat this pattern.
The answer is (no.) x3 = (no. 2) - 1 = (no. 3) x3= (no.4) x4 and so on... 1 x 3 = 3 - 1 = 2 x 3 = 6 - 1 = 5 x 3 = 15 - 1 = 14 x 3 = 42 - 1 = 41. :D Hope i helped