SSC CGL Reasoning – Mathematical & Symbolic Operations – Level 1 · Warm-up · Tier I Level

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SSC CGL Reasoning – Mathematical & Symbolic Operations – Level 1 · Warm-up · Tier I Level – 12 questions, subject: General Intelligence & Reasoning. Every question has the correct answer with a one-line explanation; tap "Show Answer". Free practice for TNPSC, UPSC, SSC, Bank and RRB exams – Shanmugam IAS Academy, Coimbatore.

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1.  
Sign substitutionIf + means − and − means +, what is the value of 15 + 6 − 3?

Correct Answer: A [12]

Explanation:

Replace the signs: 15 − 6 + 3 = 12.

2.  
BODMASWhat is the value of 20 − 12 ÷ 4 × 2?

Correct Answer: C [14]

Explanation:

÷ and × first, left to right: 12 ÷ 4 = 3, 3 × 2 = 6; then 20 − 6 = 14.

3.  
Sign substitutionIf × means ÷ and ÷ means ×, what is the value of 24 × 6 ÷ 2?

Correct Answer: D [8]

Explanation:

Replace the signs: 24 ÷ 6 × 2 = 4 × 2 = 8 (left to right).

4.  
Interchange signsWhich two signs should be interchanged to make the equation correct?
6 ÷ 2 − 2 + 5 = 10

Correct Answer: B [− and ÷]

Explanation:

After interchanging − and ÷: 6 − 2 ÷ 2 + 5 = 6 − 1 + 5 = 10 ✓.

5.  
Operation patternIf 3 ⋆ 2 = 13 and 4 ⋆ 1 = 17, then 5 ⋆ 2 = ?

Correct Answer: B [29]

Explanation:

a ⋆ b = a² + b²: 9 + 4 = 13, 16 + 1 = 17; 25 + 4 = 29.

6.  
Defined operationIf a ⊕ b = a² − 2b, what is 6 ⊕ 5?

Correct Answer: D [26]

Explanation:

6² − 2 × 5 = 36 − 10 = 26.

7.  
Fill the signsWhich signs, in order, replace the * marks to balance the equation?
4 * 5 * 2 * 22

Correct Answer: C [(×, +, =)]

Explanation:

4 × 5 + 2 = 22 ✓.

8.  
Coded inequalityIf A @ B means A is greater than B, A # B means A is less than B and A % B means A equals B, and X @ Y and Y @ Z, which of these is definitely true?

Correct Answer: A [X @ Z]

Explanation:

X > Y > Z, so X > Z, i.e. X @ Z.

9.  
Sign substitutionIf K means ×, L means ÷, M means + and N means −, what is the value of 30 L 5 M 4 K 3 N 2?

Correct Answer: C [16]

Explanation:

30 ÷ 5 + 4 × 3 − 2 = 6 + 12 − 2 = 16.

10.  
Interchange numbersWhich two numbers should be interchanged to make the equation correct?
9 + 2 × 7 − 4 = 35

Correct Answer: A [2 and 4]

Explanation:

9 + 4 × 7 − 2 = 9 + 28 − 2 = 35 ✓.

11.  
Correct equationIf + means − and − means +, which equation is correct?

Correct Answer: D [8 + 3 − 2 = 7]

Explanation:

8 + 3 − 2 becomes 8 − 3 + 2 = 7 ✓.

12.  
BODMASWhat is the value of (8 + 4) ÷ 3 × 2 − 5?

Correct Answer: B [3]

Explanation:

Bracket first: 12 ÷ 3 × 2 − 5 = 4 × 2 − 5 = 3.

➤ Full notes, shortcuts and every answer explained – SSC CGL 2026 General Intelligence & Reasoning book (₹149): www.shanmugamiasacademy.in/study-materials/ssc-cgl-general-intelligence-reasoning

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