The left and right page numbers of an open book are two consecutive integers whose sum is 389. Find these page numbers.

Réponse:

194 and 195

Explications:

α = left page

α + 1 = right page

α + α + 1 = 389

2α + 1 = 389

2α = 388

α = 194

α + 1 = 195

(this is maths and not Arabic)