Select the option that is related to the third number

Solution

. 35 = 7 × 5    ↓                                                                                                        (Subtracting the factor of 35)    7 – 5 = 2 ⇒ 2 × 2 = 4                                                      (Subtracted value multiplied by 2) Similarly, 39 = 13 × 3 ↓                                                                                           (Subtracting the factor of 39) 13 – 3 = 10 ⇒ 10 × 2 = 20                                                (Subtracted value multiplied by 2) Hence, option D is correct.