Basic Maths and Reasoning MCQs (page 209 of 212)
Percentages, ratios, averages, profit and loss, speed and time, number series and simple logical reasoning, with the working shown for every answer.
4,221 questions. Select an option to check your answer, or open "Show answer". Showing 4161–4180.
- 4161.
Which number is the odd one out: 23, 45, 47, 79?
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Answer: B. 45
45 is not a prime number (45 = 3 × 15); the others are prime.
- 4162.
Which number is the odd one out: 2, 17, 87, 89?
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Answer: C. 87
87 is not a prime number (87 = 3 × 29); the others are prime.
- 4163.
Which number is the odd one out: 3, 17, 47, 87?
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Answer: D. 87
87 is not a prime number (87 = 3 × 29); the others are prime.
- 4164.
Which number is the odd one out: 23, 41, 55, 67?
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Answer: C. 55
55 is not a prime number (55 = 5 × 11); the others are prime.
- 4165.
Which number is the odd one out: 2, 41, 61, 91?
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Answer: D. 91
91 is not a prime number (91 = 7 × 13); the others are prime.
- 4166.
Which number is the odd one out: 7, 29, 55, 61?
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Answer: C. 55
55 is not a prime number (55 = 5 × 11); the others are prime.
- 4167.
Which number is the odd one out: 45, 53, 61, 83?
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Answer: A. 45
45 is not a prime number (45 = 3 × 15); the others are prime.
- 4168.
Which number is the odd one out: 2, 23, 93, 97?
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Answer: C. 93
93 is not a prime number (93 = 3 × 31); the others are prime.
- 4169.
Which number is the odd one out: 2, 29, 61, 95?
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Answer: D. 95
95 is not a prime number (95 = 5 × 19); the others are prime.
- 4170.
Which number is the odd one out: 47, 73, 81, 89?
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Answer: C. 81
81 is not a prime number (81 = 3 × 27); the others are prime.
- 4171.
Which number is the odd one out: 19, 53, 63, 71?
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Answer: C. 63
63 is not a prime number (63 = 3 × 21); the others are prime.
- 4172.
Which number is the odd one out: 29, 73, 81, 89?
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Answer: C. 81
81 is not a prime number (81 = 3 × 27); the others are prime.
- 4173.
Which number is NOT a perfect square: 4, 44, 196, 225?
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Answer: B. 44
4, 196, 225 are perfect squares; 44 is not.
- 4174.
Which number is NOT a perfect square: 4, 110, 144, 225?
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Answer: B. 110
4, 144, 225 are perfect squares; 110 is not.
- 4175.
Which number is NOT a perfect square: 9, 18, 81, 121?
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Answer: B. 18
9, 81, 121 are perfect squares; 18 is not.
- 4176.
Which number is NOT a perfect square: 25, 80, 121, 169?
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Answer: B. 80
25, 121, 169 are perfect squares; 80 is not.
- 4177.
Which number is NOT a perfect square: 9, 16, 36, 170?
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Answer: D. 170
9, 16, 36 are perfect squares; 170 is not.
- 4178.
Which number is NOT a perfect square: 16, 25, 127, 169?
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Answer: C. 127
16, 25, 169 are perfect squares; 127 is not.
- 4179.
Which number is NOT a perfect square: 25, 36, 49, 171?
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Answer: D. 171
25, 36, 49 are perfect squares; 171 is not.
- 4180.
Which number is NOT a perfect square: 4, 46, 49, 121?
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Answer: B. 46
4, 49, 121 are perfect squares; 46 is not.