Select the odd number from the given alternatives.
- A583
- B275
- C286
- D427
Solution & Step-by-step Explanation
Let's check the divisibility rule of 11 or alternating patterns for the given choices:
For 583: Sum of first and last digit is 5+3=8 (which is equal to the middle digit). Also, 583÷11=53.
For 275: Sum of first and last digit is 2+5=7 (which is equal to the middle digit). Also, 275÷11=25.
For 286: Sum of first and last digit is 2+6=8 (which is equal to the middle digit). Also, 286÷11=26.
For 427: Sum of first and last digit is 4+7=11
=2 (the middle digit). 427 is not completely divisible by 11.
Hence, 427 is the odd one out.
For 583: Sum of first and last digit is 5+3=8 (which is equal to the middle digit). Also, 583÷11=53.
For 275: Sum of first and last digit is 2+5=7 (which is equal to the middle digit). Also, 275÷11=25.
For 286: Sum of first and last digit is 2+6=8 (which is equal to the middle digit). Also, 286÷11=26.
For 427: Sum of first and last digit is 4+7=11
=2 (the middle digit). 427 is not completely divisible by 11.
Hence, 427 is the odd one out.