Chapter 10
IQ and Reasoning
Lok Sewa Aayog (Public Service Commission) past exam questions
Past questions and answers
4 questions set from this chapter. Most repeated first.
- 2083 · Pre-Qualifying Exam (Pretest) · 1 mark
If 12 workers complete a job in 18 days, how many workers are required to complete the same job in 9 days?
(a) 21
(b) 24
(c) 27
(d) 30
Answer
(b) 24
Work is constant: (12 \times 18 = 216) worker-days. To finish in 9 days, workers required (= \frac{216}{9} = 24).
Answer checked by Claude Haiku · Oct 21, 2026
Test yourself · 1 MCQ
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- 2083 · Pre-Qualifying Exam (Pretest) · 1 mark
Last year there were 610 boys in a school. The number decreased by 20 percent this year. How many girls are there in the school if the number of girls is 175 percent of the total number of boys in the school this year?
(a) 782
(b) 798
(c) 848
(d) 854
Answer
(d) 854
Boys this year .
Girls (= 175%) of (488 = 488 \times \frac{175}{100} = 854).
Answer checked by Claude Haiku · Oct 21, 2026
Test yourself · 1 MCQ
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- 2083 · Pre-Qualifying Exam (Pretest) · 1 mark
The average of eight numbers is 24. If one number is excluded, the average becomes 22. What is the excluded number?
(a) 32
(b) 36
(c) 38
(d) 40
Answer
(c) 38
Total of 8 numbers = .
Total of remaining 7 numbers = .
Excluded number = .
Answer checked by Claude Haiku · Oct 21, 2026
Test yourself · 2 MCQs
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- 2083 · Pre-Qualifying Exam (Pretest) · 1 mark
A box contains 4 white and 6 black balls. Two balls are drawn one after another without replacement. What is the probability that both balls are white?
(a) 2/15
(b) 1/5
(c) 4/25
(d) 3/20
Answer
(a) 2/15
Probability that first ball is white , and second ball is also white .
So, required probability .
Answer checked by Claude Haiku · Oct 21, 2026
Test yourself · 2 MCQs
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Questions from Lok Sewa Nayab Subba NASU General (Nayab Subba (Non-Gazetted First Class) or equivalent · Service-Group Related Subject · 2082), Lok Sewa Nayab Subba NASU Various (Nayab Subba (Non-Gazetted First Class) or equivalent · 2nd Paper: Contemporary Studies and Public Service Management · 2082), Lok Sewa Nayab Subba NASU Audit Service (Nayab Subba (Non-Gazetted First Class) or equivalent · 3rd Paper · 2082), Lok Sewa Nayab Subba NASU Non-Technical (Nayab Subba (Non-Gazetted First Class) or equivalent · 2nd Paper · 2082), Nepal Judicial Service Nayab Subba (Nayab Subba (Non-Gazetted First Class) or equivalent · 3rd · 2082), Nepal Administration and Federal (Nayab Subba (Non-Gazetted First Class) or equivalent (Non-Technical) · 3rd · 2082), Nepal Foreign Service Nayab Subba (Nayab Subba (Non-Gazetted First Class) or equivalent · 3rd · 2081), Nepal Administration Service Nayab Subba (Nayab Subba (Non-Gazetted First Class) or equivalent (Non-Technical) · 3rd · 2081), Nayab Subba Non-Technical (Nayab Subba (Non-Gazetted First Class) or equivalent (Non-Technical) · 3rd · 2081), Nepal Judicial Service Nayab Subba (Nayab Subba (Non-Gazetted First Class) or equivalent · 3rd · 2081), Loksewa PSC Exam Question for Nayab Subba (Nayab Subba (Non-Gazetted First Class) or equivalent (Non-Technical) · 2nd · 2081), Nayab Subba Lok Sewa Exam Questions (Nayab Subba (Non-Gazetted First Class) or equivalent · Service-Group Related Subject · 2080), Nayab Subba Non-Gazetted First Class (Nayab Subba (Non-Gazetted First Class) · 2nd paper · 2079), Nayab Subba Exam Questions Lok Sewa (Nayab Subba (Non-Gazetted First Class) or equivalent · 3rd · 2080), Nayab Subba Exam Questions Lok Sewa (Nayab Subba (Non-Gazetted First Class) · Service-Group Related Subject · 2077), NHRC Nepal Assistant 1st Nayab Subba (Assistant 1st Level, Nayab Subba or equivalent · 2nd · 2081) and Lok Sewa Assistant Nayab Subba Pre (Assistant 1st Class / Nayab Subba or Equivalent, 5th Level · Pre-Qualifying Exam (Pretest) · 2083). Answers are written for this site; check them against your class notes.