Find the odd one out: 28 65 126 215 28 is the only number with all even digits.

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Question
Find the odd one out:
Options
A. 28
B. 65
C. 126
D. 215

Correct Answer

28

Explanation

28 is the only number with all even digits.

Classification problems

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1. Find the odd one out:
Options
A. 263
B. 111
C. 242
D. 551

Discuss

Correct Answer:

Explanation:

In all the numbers except 383, the middle digit is the product of the other two digits.

2. Find the odd one out:
Options
A. 2
B. 16
C. 56
D. 128

Discuss

Correct Answer: 56

Explanation:

Except 56 all can be expressed as power of 2.

3. Find the odd one out:
Options
A. 119
B. 136
C. 147
D. 153

Discuss

Correct Answer: 119

Explanation:

Only 119 has different factors, 7 and 17 and no factors are repeated.

4. Find the odd one out:
Options
A. 22
B. 121
C. 242
D. 363

Discuss

Correct Answer: 22

Explanation:

Except 22 all are in the from 11² x 1, 11² x 2, 11² x 3 etc.

5.
NA
Options
A. 120
B. 168
C. 290
D. 380

Discuss

Correct Answer: 380

Explanation:

Each of the numbers except 380, is either one less or one more than the square of a certain number.

6. Find the odd one out:
Options
A. 361
B. 484
C. 566
D. 529

Discuss

Correct Answer: 566

Explanation:

566 is the odd one out as the rest of the numbers are perfect squares.

7. Find the odd one out:
Options
A. 369
B. 462
C. 761
D. 862

Discuss

Correct Answer: 761

Explanation:

761 is the only prime in the group.

8. Find the odd one out:
Options
A. 21
B. 69
C. 81
D. 83

Discuss

Correct Answer: 83

Explanation:

All are multiple of 3 except 83.

9. Find the odd one out:
Options
A. 1236
B. 2346
C. 4566
D. 5686

Discuss

Correct Answer: 5686

Explanation:

The unit digit remains same, and the thousand place, hundredth place and tenth place changes and follow particular pattern except in 5686.

10. Find the odd one out:
Options
A. 11
B. 13
C. 15
D. 17

Discuss

Correct Answer: 15

Explanation:

All numbers are prime numbers except 15.

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