The OSSSC RI (Revenue Inspector), ARI (Assistant Revenue Inspector), and Amin Exam 2024 are crucial examinations that require a comprehensive understanding of various Arithmetic topics. To help aspirants prepare effectively, we have compiled a set of 30 competitive-level Arithmetic MCQs covering a wide range of subjects.
Top 30 Arithmetic MCQs for OSSSC RI, ARI, Amin, 11 January 2024
These 30 General Studies Multiple Choice Questions cover a diverse range of topics relevant to the OSSSC RI, ARI, and Amin Exam 2024. Use these questions as a tool to assess your knowledge and enhance your preparation for the upcoming examination. Remember to review the explanations and expand your understanding of each topic to ensure a well-rounded preparation. Best of luck!
1Q. The average of 13 numbers is 38. If the average of the first seven numbers is 36 and the average of the last seven numbers is 40, then what is the seventh number?
(A) 38
(B) 45
(C) 30
(D) 33
Answer:- (A) 38
2Q. Solve:
5 × 5 × 5 + 3 × 5 × 5 × 6 + 3 × 5 × 6 × 6 + 6 × 6 × 6
(A) 1586
(B) 1452
(C) 1331
(D) 1352
Answer :- (C) 1331
3Q. The total salary of Rakesh and Mohan is Rs 3000. Rakesh saves 25% of his monthly salary and Mohan saves 20%. What is Rakesh’s salary if his total savings are Rs 700?
(A) Rs 1300
(B) Rs 2000
(C) Rs 1900
(D) Rs 1600
Answer :- (B) Rs 2000
4Q. If 18 binders can bind 1200 books in 12 days, then how many binders will be required to bind 800 books in 24 days?
(A) 4
(B) 8
(C) 6
(D) 10
Answer:- (C) 6
5Q. The average of 25 observations is 76.4. But later it was found that instead of 74, 47 was mistakenly read, then what is the correct mean?
(A) 77.48
(B) 77.30
(C) 78.68
(D) 78.86
Answer:- (A) 77.48
6Q. By doubling a number, 8 is added to it. Then multiplying the number obtained by 6 gives the number 108, then find that number.
(A) 6
(B) 8
(C) 7
(D) 5
Answer: (D) 5
7Q. In any ΔOPQ, P is at right angle, OP = 7 cm, OQ – PQ = 1 cm. The value of sin Q is
(A) 7/26
(B) 24/25
(C) 7/25
(D) 7/9
Answer :- (B) 24/25
8Q. If A, B, C are interior angles of a triangle and sin ((B+C)/2) – cos (x), then x is
(A) A
(B) (A/2)
(C) (-A)
(D) (3A/2)
Answer :- (B) (A/2)
9Q. If sin 3A = cos (A – 26°), where 3A is an acute angle, then the value of A is
(A) 26°
(B) 27°
(C) 28°
(D) 29°
Answer :- (D) 29°
10 Q. (sin θ – 2 sin 3 θ)/(2 cos 3 θ – cos θ) है
(A) cot θ
(B) tan θ
(C) sec θ
(D) cosec θ
Answer:- (B) tan θ
11Q. If x is the arithmetic mean of x 1 , x 2 , …., x n , then the value of n ∑ i=1 (x – x̄) is
(A) 2x̄
(B) (n – 1)x̄
(C) 1
(D) 0
Answer:- (D) 0
12Q. What is the median of the first five prime numbers?
(A) 4
(B) 5
(C) 8
(D) 6
Answer:- (B) 5
13Q. A die is thrown twice. What is the probability of coming up with ‘5’ at least once?
(A) ⅓
(B) 11/36
(C) ⅙
(D) 25/36
Answer:- (B) 5
14Q. The slant height of the frustum of radii r 1 , r 2 and height h is
(A) √(h2 + (r1 – r2))2
(B) √(h2 + (r1 + r2))2
(C) √(h2 – (r1 – r2))2
(D) √(h2 – (r1 + r2))2
Answer :- (C) √(h2 – (r1 – r2))2
15Q. 6 cm, 8 cm respectively. And 10 cm. Three solid metal spheres of radii each are melted to form a larger solid sphere. The radius of this sphere is:
(A) 16 cm
(B) 32 cm.
(C) 22 cm.
(D) 12 cm
Answer:- (D) 12 cm
16Q. The roots of the equation x 2 – 5x + 8 =0 are
(A) Real and fractional
(B) Real and equal
(C) ½ (5 ± i√7)
(D) ½ (3 ± i√5)
Answer:- (A) Real and fractional
17Q. (1101) 2 + (11101) 2 is equal to
(A) (1101001)2
(B) (101010) 2
(C) (110101)2
(D) (1010101)2
Answer:- (B) (101010) 2
18Q. In binary system the number 25 will be written as
(A) (10110)2
(B) (11100)2
(C) (11001)2
(D) (10011)2
Answer:- (C) (11001)2
19Q. If 2x 2 + 3x + 1 is divided by (3x + 2), then the remainder is
(A) 1/9
(B) – 1/9
(C) 2/9
(D) -2/9
Answer :- (D) -2/9
20Q. On dividing x 3 – 3x 2 + x + 2 by the polynomial g(x), the quotient and remainder are x – 2 and -2x + 4 respectively. g(x) is
(A) x2 – x + 1
(B) x2 + x + 1
(C) x2 + x – 1
(D) x2 – x – 1
Answer :- (A) x2 – x + 1
21Q. The zeros of the polynomial x 3 – 3x 2 + x + 1 are a – b, a, a + b, then a + b is
(A) –1 + √2
(B) –1 – √2
(C) –1 ± √2
(D) None of these
Answer:- (D) None of these
22Q. The sum of the areas of two squares is 468 m. 2 and the difference of their perimeters is 24 m. is, then the sum of all the sides of both the squares is.
(A) 120 m.
(B) 100 m.
(C) 80 m.
(D) 140 m.
Answer:- (A)
23Q. For which value of t is the following pair of equations a unique solution?
4x + ty + 6 = 0
2x + 2y + 2 = 0
(A) 1
(B) 2
(C) Both (a) and (b)
(D) 4
Answer:- (D) 4
24Q. Which of the following is true?
(A) The tangent line at any point to the circle is perpendicular to the radius passing through the point of contact.
(B) The lengths of the tangents drawn from an external point to the circle are equal.
(A) Only (A)
(B) Only (B)
(C) Both (A) and (B)
(D) Neither (A) nor (B)
Answer:- (A)
25Q. For which value of natural number n does 4 n (unit digit of which is zero) end at zero digit?
(A) 11
(B) 12
(C) 18
(D) None of these
Answer:- (D) None of these
26Q. Which of the following is not an irrational number?
(A) √15
(B) π
(C) 0.10110111011110…
(D) 0.10101010…
Answer :-(A) √15
27Q. Two cubes, each of which has a volume of 125 cubic cm. , are connected to each other by adjacent faces. The surface area of the cuboid obtained from this is
(A) 250 square cm.
(B) 225 square cm.
(C) 200 square cm.
(D) None of these
Answer:- (C) 200 square cm.
28Q..Which is the first negative term of the arithmetic progression 121, 117, 113?
(A) 31st
(B) 32nd
(C) 33rd
(D) 34th
Answer:- (B) 32nd
29Q..The sum of odd numbers between 0 and 50 is
(A) 625
(B) 1250
(C) 750
(D) 725
Answer:- (A) 625
30Q.. For what value of n, the nth terms of the two arithmetic progressions 63, 65, 67, … and 3, 10, 17, … will be equal?
(A) 13
(B) 11
(C) 10
(D) 12
Answer:- (A) 13
