Multiple choice general knowledge math & puzzles

The position of the first and the sixth digits in number 5314278906 are interchanged. Similarly the position of the second and the saventh digits are interchanged and so on. Which of the following will be the fourth from the right end after the rearrangemenr?

  1. 3

  2. 1

  3. 4

  4. 5
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Original: 5314278906. Swap position 1-6: 7 takes 5's place. Swap 2-7: 8 takes 3's place. Swap 3-8: 0 takes 1's place. Swap 4-9: 9 takes 4's place. Result: 7890534216. Fourth from right (positions 3,2,1,4 from right): 3.

AI explanation

Original number: 5 3 1 4 2 7 8 9 0 6 (positions 1–10). Swapping position 1↔6, 2↔7, 3↔8, 4↔9, 5↔10 gives: 7 8 9 0 6 5 3 1 4 2. Counting from the right end: 2 is 1st, 4 is 2nd, 1 is 3rd, and 3 is 4th from the right. So the fourth digit from the right is 3, matching the marked answer.

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