Question : Directions: Some equations are solved on the basis of a certain system. Find the correct answer for the unsolved equation on that basis.
4 × 5 = 42
5 × 6 = 56
6 × 7 = 72
7 × 8 = ?

Option 1: 84

Option 2: 90

Option 3: 92

Option 4: 102

Question : Directions: Some equations are solved based on a certain system. Find the correct answer for the unsolved equation on that basis.
5 * 6 = 35; 8 * 4 = 28; 6 * 8 = ?

Option 1: 46

Option 2: 34

Option 3: 23

Option 4: 38

Question : Directions: Some equations are solved based on certain systems. On the same basis, find the correct answer from amongst the four alternatives for the unsolved equation in the question.
a = 12(390)8; b = 7(134)5; c = 5(?)12

Option 1: 299

Option 2: 289

Option 3: 279

Option 4: 280

Question : Directions: Some equations are solved based on certain systems. On the same basis find the correct answer for the unsolved equation.
If 13 X 12 = 651 and 41 X 23 = 448, then 24 X 22 =?

Option 1: 504

Option 2: 46

Option 3: 528

Option 4: 924

Question : Directions: In this question, some equations are solved on the same basis as a certain system. On the same basis, find out the correct answer out of the four alternatives.
If 34 = 39304, 27 = 19683, then 13 = ?

Option 1: 2197

Option 2: 10648

Option 3: 56743

Option 4: 17576