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CSS - PMS - CCE - PCS - Mathematics Practice

Number System MCQs

Practice important Number System MCQs with answers, explanations, theory links, and exam-focused preparation.

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Number System

Number System MCQs With Answers

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CSS - PMS - CCE - PCS - Mathematics Number System
The next number in the sequence 2, 4, 8, 16 is:
A. 18
B. 24
C. 30
D. 32
Correct Answer: D
D: Correct because each term doubles, so after 16 comes 32. A: Wrong because 18 adds 2 only. B: Wrong because 24 adds 8 but breaks doubling. C: Wrong because 30 does not follow doubling.
CSS - PMS - CCE - PCS - Mathematics Number System
Which of the following is a prime number?
A. 21
B. 29
C. 35
D. 39
Correct Answer: B
A: Wrong because 21 = 3 × 7. B: Correct because 29 has no divisors other than 1 and 29. C: Wrong because 35 = 5 × 7. D: Wrong because 39 = 3 × 13.
CSS - PMS - CCE - PCS - Mathematics Number System
Binary of decimal 10 is:
A. 1010
B. 1000
C. 1110
D. 1100
Correct Answer: A
Correct Answer: A. 1010 Fact Check: Decimal 10 is represented as 1010 in binary. A. Correct — 1010 is right because Decimal 10 is represented as 1010 in binary. B. 1000 is not correct because it is lower than the correct figure, 1010. C. 1110 is not correct because it is higher than the correct figure, 1010. D. 1100 is not correct because it is higher than the correct figure, 1010.
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