alleryStart learning →Find the next number in the series: 2, 6, 12, 20, 30, ?
- 36
- 42
- 44
- 40
Show answer and solution
Correct answer: B. 42
Differences are 4, 6, 8, 10, so the next difference is 12: $30 + 12 = 42$.
(General term $n(n+1)$.)
Bihar Board Class 10 (BSEB) Coding and Decoding — practice questions
Explore 36 free Coding and Decoding questions in Bihar Board Class 10 (BSEB) Reasoning. Open each question or exercise to read its content, reference answers and available explanation.
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Showing questions 1–30 of 36.
Find the next number in the series: 2, 6, 12, 20, 30, ?Read the answer and worked solution →Which one does NOT belong with the others? Square, Rectangle, Rhombus, TriangleRead the answer and worked solution →Pointing to a photo, a man says, 'She is the daughter of my grandfather's only son.' How is the girl related to the man?Read the answer and worked solution →A man walks 5 km North, turns right and walks 3 km, turns right again and walks 5 km. How far is he from the start?Read the answer and worked solution →In a certain code, 'TEACHER' is written as 'VGCEJGT'. How is 'STUDENT' written?Read the answer and worked solution →Complete the analogy: Day : Night :: Hot : ?Read the answer and worked solution →Find the missing term: 3, 7, 16, 35, 74, ?Read the answer and worked solution →If '+' means '×', '×' means '−', '−' means '÷', '÷' means '+', then $16 \div 4 - 2 \times 6 + 2 = ?$Read the answer and worked solution →In a row of 40 students, A is 11th from the left and B is 15th from the right. How many students are between them?Read the answer and worked solution →Find the odd one out: 2, 3, 5, 7, 9, 11Read the answer and worked solution →Letter series: A, C, F, J, O, ?Read the answer and worked solution →Which number completes the pattern? 1, 4, 9, 16, 25, ?Read the answer and worked solution →A is the brother of B. B is the brother of C. C is the father of D. How is A related to D?Read the answer and worked solution →Find the next term: 1, 11, 21, 1211, 111221, ?Read the answer and worked solution →Statements: All pens are books. Some books are pencils. Conclusion which definitely follows:Read the answer and worked solution →If today is Wednesday, what day will it be after 100 days?Read the answer and worked solution →Match each proposition form to its letterRead the answer and worked solution →Universal or particular? Affirmative or negative?Read the answer and worked solution →Affirmative or negative?Read the answer and worked solution →Naming the formRead the answer and worked solution →True or false: what conversion allowsRead the answer and worked solution →Tap every inference that is actually validRead the answer and worked solution →Complete the four formsRead the answer and worked solution →True or false: what a universal claim coversRead the answer and worked solution →Deduction or induction?Read the answer and worked solution →Order the steps: test a syllogismRead the answer and worked solution →True or false: reasoning from two premisesRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →
Worked practice questions
Which one does NOT belong with the others? Square, Rectangle, Rhombus, Triangle
- Triangle
- Square
- Rectangle
- Rhombus
Show answer and solution
Correct answer: A. Triangle
Square, rectangle and rhombus are all quadrilaterals (4 sides).
A triangle has 3 sides, so it is the odd one out.
Pointing to a photo, a man says, 'She is the daughter of my grandfather's only son.' How is the girl related to the man?
- Niece
- Daughter
- Cousin
- Sister
Show answer and solution
Correct answer: D. Sister
'My grandfather's only son' is the man's own father.
The father's daughter is the man's sister.
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