Multiple choice general knowledge math & puzzles

In the below Question, 5 numbers are given. Out of these 4 are alike in certain way but the rest 1 is different.

  1. 7359

  2. 1593

  3. 9175

  4. 3781

  5. 9317
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The number 3781 is different because it's the only number where the product of the first two digits equals the sum of the last two digits (3×7=21, 8+1=9, not equal). The pattern for others is: 7×3=21 matches 5+9=14 (sum of digits of 21 is 2, but wait - the actual pattern is that for 7359, 1593, 9317: first digit × second digit = third + fourth digit's digits sum... actually, the simpler pattern is 3781 is the only one not following the digit rotation pattern present in others).

AI explanation

7359, 1593, 9175, and 9317 are all formed entirely from odd digits (1, 3, 5, 7, 9), while 3781 contains the digit 8, which is even. That single even digit breaks the pattern shared by the other four numbers, making 3781 the odd one out.

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