What will be the difference between the first digit of the highest number as…
2022
What will be the difference between the first digit of the highest number as well as of the lowest number after the positions of the first two digits in each number of the following series are reversed? Series : 738, 429, 156, 273, 894
- A.
4
- B.
5
- C.
6
- D.
7
Attempted by 77 students.
Show answer & explanation
Correct answer: D
Solution:
Swap the first two digits of each number:
738 → 378
429 → 249
156 → 516
273 → 723
894 → 984
After swapping, the numbers are 378, 249, 516, 723, and 984.
The largest is 984 and the smallest is 249.
First digit of largest: 9; first digit of smallest: 2.
Difference = 9 − 2 = 7