226. Which base is allowed for a logarithm loga x?
- a = 0
- a = 1
- a = -2
- a = 5
Answer: D) a = 5
Explanation: The base must be positive and not equal to 1. SLO M-09-A-06 · Knowledge
MCQs / Mathematics / Real Numbers
Real Numbers MCQs — Mathematics (page 10)
230 multiple-choice questions on Real Numbers from Mathematics, each with the correct answer and, where available, a teacher's explanation. Read through them to revise the chapter, then practise the same questions one by one to test yourself.
227. A phone bought for Rs. 500 is sold for Rs. 460. The loss percentage is:
- 10%
- 8%
- 40%
- 8.7%
Answer: B) 8%
Explanation: Loss = 40. Loss % = 40500 100 = 8%. SLO M-09-A-09 · Application
228. Which of the following is an irrational number?
- -5
- -38
- 144
- 15
Answer: D) 15
Explanation: 15 is irrational because 15 is not a perfect square. The others can be written as pq (e.g. 49 = 7, 0.overline3 = 13). SLO M-09-A-02 · Knowledge
229. Evaluate 16^ 34.
- 12
- 8
- 16
- 18
Answer: B) 8
Explanation: 16 = 2^4, so 16^ 34 = (2^4 )^ 34 = 2^3 = 8. SLO M-09-A-04 · Application
230. Zakat is 2.5% of savings. The zakat on Rs. 800,000 is:
- Rs. 20,000
- Rs. 200,000
- Rs. 22,500
- Rs. 2,000
Answer: A) Rs. 20,000
Explanation: 2.5% 800000 = 2.5100 800000 = 20000. SLO M-09-A-09 · Application
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