łamigłówki
Brakująca liczba to?
Brakująca liczba to: 155
Bo:
(5 + 2) + ( 5 x 2) = 7 + 10 = 17
(7 + 3) + (7 x 3) = 10 + 21 = 31
(3 + 4) + (3 x 4) = 7 + 12 = 19
(4 + 8) + (4 x 8) = 12 + 32 = 44
i
(11 + 12) + (11 x 12) = 155
Bo:
(5 + 2) + ( 5 x 2) = 7 + 10 = 17
(7 + 3) + (7 x 3) = 10 + 21 = 31
(3 + 4) + (3 x 4) = 7 + 12 = 19
(4 + 8) + (4 x 8) = 12 + 32 = 44
i
(11 + 12) + (11 x 12) = 155