Find the odd one out: 143 133 131 87 131 is the odd one out as it is the only pr

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

Correct Answer

131

Explanation

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

Classification problems

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1. 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.

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

Discuss

Correct Answer: 23

Explanation:

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

3. 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.

4. 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.

5. 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.

6. 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.

7. 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.

8. 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.

9. Find the odd one out:
Options
A. 64
B. 169
C. 484
D. 315

Discuss

Correct Answer: 315

Explanation:

315 is the odd one out as the rest all are squares of different numbers.

10. Find the odd one out:
Options
A. 37
B. 45
C. 49
D. 65

Discuss

Correct Answer: 49

Explanation:

49 is the only perfect square; rest are just random numbers.

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