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English SSC CGL Tier I papers. Free 60-minute mocks, 100 questions, 200 marks; +2 correct and −0.5 incorrect. Source: SSC response sheets preserved by SSC Portal. The marked archived keys have not been independently revalidated against final SSC keys; worked explanations are pending review. A/B/C/D correspond to source options 1/2/3/4.

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Question 1 · Quantitative Aptitude · Algebra
Find the 23th term of the arithmetic progression 9, 18, 27, ...
Choose your answer for question 1
Answer and explanation

Correct answer: B

nth term = a + (n−1)d = 9 + 22×9 = 207.

Question 2 · Quantitative Aptitude · Algebra
Find the sum of the first 12 terms of the AP with first term 9 and common difference 5.
Choose your answer for question 2
Answer and explanation

Correct answer: C

S = n/2 [2a + (n−1)d] = 12/2 × [18 + 55] = 438.

Question 3 · Quantitative Aptitude · Algebra
Solve for x: 11x + 25 = 245
Choose your answer for question 3
Answer and explanation

Correct answer: B

11x = 245 − 25 = 220, so x = 20.

Question 4 · Quantitative Aptitude · Algebra
If a + b = 10 and ab = 24, what is the value of a² + b²?
Choose your answer for question 4
Answer and explanation

Correct answer: C

a² + b² = (a+b)² − 2ab = 100 − 48 = 52.

Question 5 · Quantitative Aptitude · Algebra
If a − b = 10 and a² + b² = 122, find ab.
Choose your answer for question 5
Answer and explanation

Correct answer: D

ab = [a² + b² − (a−b)²]/2 = (122 − 100)/2 = 11.

Question 6 · Quantitative Aptitude · Algebra
If x + 1/x = 2, what is the value of x² + 1/x²?
Choose your answer for question 6
Answer and explanation

Correct answer: D

x² + 1/x² = (x + 1/x)² − 2 = 4 − 2 = 2.

Question 7 · Quantitative Aptitude · Algebra
Expand and simplify: (12x + 9)² − (12x − 9)²
Choose your answer for question 7
Answer and explanation

Correct answer: C

(p+q)² − (p−q)² = 4pq = 4×12x×9 = 432x.

Question 8 · Quantitative Aptitude · Algebra
What is the sum of the roots of the equation x² − (-1)x − 110 = 0?
Choose your answer for question 8
Answer and explanation

Correct answer: A

For ax² + bx + c = 0 the sum of roots is −b/a = -1.

Question 9 · Quantitative Aptitude · Algebra
What is the value of sin 90°?
Choose your answer for question 9
Answer and explanation

Correct answer: D

Standard value: sin 90° = 1.

Question 10 · Quantitative Aptitude · Algebra
If sin θ = 20/29 (θ acute), find cot θ.
Choose your answer for question 10
Answer and explanation

Correct answer: A

Take the right triangle with perpendicular 20, base 21, hypotenuse 29; cot θ = 21/20.

Question 11 · Quantitative Aptitude · Algebra
Evaluate 15² − 20² using the identity a² − b² = (a + b)(a − b).
Choose your answer for question 11
Answer and explanation

Correct answer: B

(15+20)(15−20) = 35 × -5 = -175.

Question 12 · Quantitative Aptitude · Algebra
Find the 35th term of the arithmetic progression 19, 25, 31, ...
Choose your answer for question 12
Answer and explanation

Correct answer: C

nth term = a + (n−1)d = 19 + 34×6 = 223.

Question 13 · Quantitative Aptitude · Algebra
Find the sum of the first 21 terms of the AP with first term 14 and common difference 7.
Choose your answer for question 13
Answer and explanation

Correct answer: B

S = n/2 [2a + (n−1)d] = 21/2 × [28 + 140] = 1764.

Question 14 · Quantitative Aptitude · Algebra
Solve for x: 3x + 10 = -26
Choose your answer for question 14
Answer and explanation

Correct answer: A

3x = -26 − 10 = -36, so x = -12.

Question 15 · Quantitative Aptitude · Algebra
If 5x + 1y = 49 and 2x + 1y = 28, what is the value of x + y?
Choose your answer for question 15
Answer and explanation

Correct answer: B

Solving the equations gives x = 7, y = 14; x + y = 21.

Question 16 · Quantitative Aptitude · Algebra
If a + b = 12 and ab = 27, what is the value of a² + b²?
Choose your answer for question 16
Answer and explanation

Correct answer: B

a² + b² = (a+b)² − 2ab = 144 − 54 = 90.

Question 17 · Quantitative Aptitude · Algebra
If a − b = 1 and a² + b² = 25, find ab.
Choose your answer for question 17
Answer and explanation

Correct answer: C

ab = [a² + b² − (a−b)²]/2 = (25 − 1)/2 = 12.

Question 18 · Quantitative Aptitude · Algebra
Expand and simplify: (6x + 11)² − (6x − 11)²
Choose your answer for question 18
Answer and explanation

Correct answer: C

(p+q)² − (p−q)² = 4pq = 4×6x×11 = 264x.

Question 19 · Quantitative Aptitude · Algebra
What is the sum of the roots of the equation x² − 6x − 135 = 0?
Choose your answer for question 19
Answer and explanation

Correct answer: B

For ax² + bx + c = 0 the sum of roots is −b/a = 6.

Question 20 · Quantitative Aptitude · Algebra
What is the value of cos 0°?
Choose your answer for question 20
Answer and explanation

Correct answer: A

Standard value: cos 0° = 1.

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