Find the odd one out: 17 13 23 37 All numbers are prime numbers but when we reve

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Question
Find the odd one out:
Options
A. 17
B. 13
C. 23
D. 37

Correct Answer

23

Explanation

All numbers are prime numbers but when we reverse the digits all except 23 remain prime numbers.

Classification problems

Search Results

1. 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.

2. 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.

3. 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.

4. 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.

5. 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.

6. Find the odd one out:
Options
A. 126
B. 217
C. 345
D. 513

Discuss

Correct Answer: 345

Explanation:

All the numbers except 345 are one more than the cube of a certain number.

7. Find the odd one out:
Options
A. 143
B. 133
C. 131
D. 87

Discuss

Correct Answer: 131

Explanation:

131 is the odd one out as it is the only prime number.

8. Find the odd one out:
Options
A. 27
B. 64
C. 125
D. 144

Discuss

Correct Answer: 144

Explanation:

144 is the square of 12 whereas the rest are cube of certain numbers.

9. Find the odd one out:
Options
A. 1593
B. 3781
C. 7359
D. 9175

Discuss

Correct Answer: 3781

Explanation:

3781 is the odd one out as other numbers contain only odd digits.

10. Find the odd one out:
Options
A. 120
B. 168
C. 290
D. 380

Discuss

Correct Answer: 380

Explanation:

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

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