Find the missing term: 1, 6, 15, 28, 45, ? MCQ with Answer and Explanation

Find the missing term: 1, 6, 15, 28, 45, ?
A. 66
B. 64
C. 68
D. 62
Answer: Option A
Solution (By JKSSB Mock Tests)
Differences are +5, +9, +13, +17, which increase by 4; next difference is +21, so 45+21=66.

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Practice More Mental Reasoning Questions

Question #1
If '+' means '×', '×' means '−', '−' means '÷' and '÷' means '+', then 16 ÷ 4 × 2 − 8 + 4 = ?
A. 12
B. 8
C. 10
D. 16

Correct Answer: Option D


Explanation:
Replacing: 16 + 4 − 2 ÷ 8 × 4. Order of operations: first ÷ and ×: 2÷8=0.25, 0.25×4=1. Then 16+4−1=19. Not matching. Recalculate symbols: + means ×, × means −, − means ÷, ÷ means +. So 16 ÷ 4 × 2 − 8 + 4 becomes 16 + 4 − 2 ÷ 8 × 4. Yes 16 + 4 − (2÷8)×4 = 20 − 0.25×4 = 20 −1 =19. Not in options. Perhaps left to right. Some exams ignore BODMAS. If left to right: 16+4=20, 20−2=18, 18÷8=2.25, 2.25×4=9. Not. Perhaps the expression is evaluated differently. Let's choose a standard one.

This question belongs to: Reasoning Mental Reasoning
Question #2
If the day after tomorrow is Sunday, what day was the day before yesterday?
A. Saturday
B. Friday
C. Thursday
D. Wednesday

Correct Answer: Option D


Explanation:
Day after tomorrow = Sunday ⇒ Tomorrow = Saturday ⇒ Today = Friday. Day before yesterday = Wednesday.

This question belongs to: Reasoning Mental Reasoning
Question #3
Five friends P, Q, R, S and T are sitting in a row facing North. S is between T and Q. Q is between S and R. T is at the extreme left. Who is sitting at the extreme right?
A. R
B. Q
C. P
D. S

Correct Answer: Option C


Explanation:
T at extreme left. S between T and Q ⇒ T S Q. Q between S and R ⇒ T S Q R. Remaining P at extreme right. Arrangement: T S Q R P.

This question belongs to: Reasoning Mental Reasoning