Direction: The following question is based on the five four digit numbers given below.
Texas Instruments technical mcq question, verified with a worked answer. Free to practise - no sign-up.
Direction:** The following question is based on the five four digit numbers given below.
1253 4658 9243 4781 2584
If the position of the first digit is changed with the second digit and the position of third digit is changed with the fourth digit, then which of the following will be fourth if they are arranged in ascending order?
Show answer & explanation
Answer: D. D) 4658
Swapping digits 1-2 and 3-4 transforms the numbers into: 2135, 6485, 2934, 7418, 5248. Sorted in ascending order: 2135, 2934, 5248, 6485, 7418. The fourth number is 6485, corresponding to original number 4658.
Step-by-step Derivation:
Step 1: Apply transformations (swap 1st-2nd, 3rd-4th):
- 1253 -> 2135
- 4658 -> 6485
- 9243 -> 2934
- 4781 -> 7418
- 2584 -> 5248
Step 2: Sort ascending: 2135, 2934, 5248, 6485, 7418.
Step 3: The 4th number is 6485, which came from 4658.