The 1954 Statelessness Status Convention provided a definition of a stateless person (which has since become part of customary international law, according to the International Law Commission), and sets out a number of rights that stateless persons should enjoy.
The ratio of two integers P and Q can be expressed as P : Q or P/Q. In both cases, you may divided P and Q by their greatest common factor so as to express the ratio in its simplest form.
(ii) The sum of any four consecutive numbers is twice the sum of two middle numbers: 1 + 2 + 3 + 4 = 10 = 2 (2 + 3) = 2 x 5. 2 + 3 + 4 + 5 = 14 = 2 (3 + 4) = 2 x 7. 5 + 6 + 7 + 8 = 26 = 2 (6 + 7) = 2 x 13. 17 + 18 + 19 + 20 = 74 = 2 (18 + 19) = 2 x 37. 40 + 41 + 42 + 43 = 166 = 2 (41 + 42) = 2 x 83. (iii) The sum of any five consecutive numbers is five times the exact middle number: 1 + 2 + 3 + 4 + 5 = 15 = 5 x 3 = (5 x 6)/2. 2 + 3 + 4 + 5 + 6 = 20 = 5 x 4 = (6 x 7)/2 â 1. 3 + 4 + 5 + 6 + 7 = 25 = 5 x 5 = (7 x 8)/2 - (1 + 2).