Q1. Find the next number in the series: 59, 61, 67, 71, 73, ?
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Answer: A. 79
These are consecutive prime numbers. Next = 79.
SSC CGL General Intelligence & Reasoning Intermediate Practice Set 7
25 intermediate questions. Tap an option to check it, or open “Show answer” for the explanation.
Topics: Number Series, Number Ranking, Classification, Missing Number, Clock, Alphabet Series, Coding-Decoding, Ranking and Order, Alphabet Test, Analogy, Direction Sense, Blood Relations
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Q2. How many numbers from 1 to 150 are divisible by 4 or 5?
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Answer: C. 60
⌊150/4⌋ + ⌊150/5⌋ − ⌊150/20⌋ = 37 + 30 − 7 = 60.
Q3. Find the next number in the series: 26, 37, 50, 65, 82, ?
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Answer: B. 101
Terms are n² + 1 for n = 5…10: 10² + 1 = 101.
Q4. Find the wrong number in the series: 4, 9, 16, 26, 36, 49, 64
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Answer: B. 26
Rule: squares of 2 to 8. The term should be 25, not 26.
Q5. Find the odd pair: 4:17, 5:25, 9:81, 11:121
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Answer: B. 4:17
In each pair except 4:17, the second number is the square of the first.
Q6. Find the missing number in the series: 1, 3, 5, ?, 21, 43
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Answer: D. 11
Pattern: ×2 + 1, ×2 − 1 alternately.
Q7. Find the missing number, following the same rule in each group: (7, 12, 84); (12, 9, 108); (2, 9, ?)
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Answer: D. 18
Rule: third = first × second. 2, 9 → 18.
Q8. A clock shows 5:00. What time will its mirror image show?
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Answer: D. 7:00
11:60 − 5:00 = 7:00.
Q9. Find the next letter in the series: D, H, L, P, ?
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Answer: A. T
Each letter moves 4 places forward: P + 4 = T.
Q10. How many numbers from 1 to 350 are divisible by 8 or 5?
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Answer: B. 105
⌊350/8⌋ + ⌊350/5⌋ − ⌊350/40⌋ = 43 + 70 − 8 = 105.
Q11. Find the next number in the series: 30, 42, 56, 72, 90, ?
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Answer: A. 110
Terms are n(n + 1) for n = 5…10. Next = 110.
Q12. In a certain code, PLANET is written as KOZMVG. How is RIVER written in that code?
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Answer: B. IREVI
Each letter is replaced by its opposite letter (A↔Z, B↔Y, …). So RIVER → IREVI.
Q13. In a row of 29 people, Nitin is 14th from the left and Kavita is 4th from the right. How many people are there between them?
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Answer: D. 11
Between = 29 − (14 + 4) = 11.
Q14. If the letters of the word 'PICTURE' are arranged in alphabetical order, which letter will be 4th from the left?
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Answer: A. P
Alphabetical order: CEIPRTU. The 4th letter is P.
Q15. A clock shows 6:15. What time will its mirror image show?
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Answer: B. 5:45
11:60 − 6:15 = 5:45.
Q16. Find the missing number, following the same rule in each group: (8, 9, 72); (2, 4, 8); (4, 2, ?)
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Answer: A. 8
Rule: third = first × second. 4, 2 → 8.
Q17. Find the odd one out: 24, 25, 36, 144
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Answer: B. 24
All except 24 are perfect squares.
Q18. Find the missing term: 20 : 10 :: 44 : ?
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Answer: C. 22
The second term is half the first: 44/2 = 22.
Q19. Pooja walks 5 m towards South, then turns right and walks 11 m, then turns left and walks 12 m, and finally turns right and walks 2 m. In which direction is Pooja now from the starting point?
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Answer: C. South-West
Net displacement: 17 m South and 13 m West. So Pooja is to the South-West of the start.
Q20. In a row of 54 people, Asha is 15th from the left and Pooja is 6th from the right. How many people are there between them?
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Answer: B. 33
Between = 54 − (15 + 6) = 33.
Q21. Suresh is the father of Manoj. Pooja is the mother of Suresh. How is Pooja related to Manoj?
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Answer: A. Grandmother
Pooja is Manoj's father's mother, i.e. Manoj's grandmother.
Q22. If the digits of the number 56389 are arranged in ascending order, what is the sum of the 1st and 3rd digits from the left?
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Answer: A. 9
Ascending: 35689. 3 + 6 = 9.
Q23. How many pairs of letters are there in the word 'DIAMOND' which have as many letters between them in the word as in the English alphabet (counting both forward and backward)?
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Answer: C. 2
The pairs are: ID, ON. Total = 2.
Q24. In a class of 50 students, Ramesh ranks 18th from the top. What is Ramesh's rank from the bottom?
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Answer: D. 33rd
Rank from bottom = 50 − 18 + 1 = 33.
Q25. Find the missing term: 22 : 506 :: 16 : ?
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Answer: B. 272
Rule: n(n + 1). 16 × 17 = 272.