Question : Directions: Some equations are solved based on a certain system. Find out the correct answer for the unsolved equation on that basis.
If 12 × 9 = 810 and 15 × 9 = 513 then 13 × 8 = ?
Option 1: 104
Option 2: 410
Option 3: 401
Option 4: 411
Correct Answer: 410
Solution :
Given:
12 × 9 = 810; 15 × 9 = 513
Multiply the numbers and shuffle the digits. The first digit moves to the second place, the second digit moves to the third place, and the third digit moves to the first place.
12 × 9 = 108→810
15 × 9 = 135→513
Similarly, for 13 × 8; 13 × 8 = 104→410
Hence, the second option is correct.
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