What minimum number must be added to each term of the ratio 2 :5, so that it may equal to 5 : 6

65 78 26 38

26

\(\frac{2R + Q}{5R + Q}\) = \(\frac{5}{6}\) ⇒ 12 R + 6Q = 25R + 5Q ⇒ Q = 13R ⇒ Q must be multiple of 13 Therefore 26 is the answer