Quant Quiz
Quant Quiz for RAILWAYS/ SSC/ DSSSB/ UPSC/ IB)– Part- 28
Online Quantitative Quiz – This quiz contains 15 questions on Mix topics and the topics are important for competitive exams like RAILWAYS, SSC, UPSC, IB, and DSSSB. Try to attempt this quiz in a
Q1. For what value of k the numbers 2, 3 + k, 2 are in arithmetic progression-
(a) 1
(b) 0
(c) -1
(d) 2
Q2. The average of 11 numbers is 40. If the average of first six numbers is 36, and that of last six numbers is 42, then find the middle number.
(a) 28
(b) 32
(c) 22
(d) 43
Q3. Value of 47 − [19 + {37 − (27 − 7)}]
(a) 10
(b) 9
(c) 8
(d) 11
Q4. The heights of Amman’s family members are given in cms as 165, 180, 181, 163, 172, 180, and 162. The median height of the family will be?
(a) 180
(b) 170
(c) 131
(d) 172
Q5. The sum of three consecutive integers is 30. Which of the following is the largest among the three?
(a) 12
(b) 13
(c) 14
(d) 11
Q6. What is 846 times of 323?
(a) 280872
(b) 276488
(c) 273258
(d) 272412
Q7. If the length of a rectangle is increased by 20% and the breadth is decreased by 10%, what will be the effect on its area?
(a) 8% increase
(b) 8% decrease
(c) 2% increase
(d) 2% decrease
Q8. A can do a work in 15 days, where B can do the same work in 25 days in how many days A and B together can do the same work
(a) 9 days
(b) 75/8 days
(c) 83/8 days
(d) 11 days
Q9. 40% of x is 480, and then what will be 120% of X?
(a) 1340
(b) 1240
(c) 1540
(d) 1440
Q10. The average age of a man and his son is 44 years. The ratio of their ages is 31:13 respectively. What is the son’s age?
(a) 35 years
(b) 26 years
(c) 15 years
(d) 20 years
Q11. A train crossed a platform in 25 seconds. The length of the platform is 240 m. What is the length of train?
(a) 140 m
(b) 200 m
(c) 180 m
(d) Cannot be determined
Q12. Rani bought a piece of cloth for Rs. 950 and spent Rs. 300 on designing it. At what price should she sell it to make 30% profit?
(a) Rs. 1,650
(b) Rs. 1,550
(c) Rs. 1,525
(d) Rs. 1,625
Q13. The ratio of angles of a triangle is 3:5:7. What is the difference (in degrees) between double the smallest angle and half largest angle?
(a) 25
(b) 36
(c) 38
(d) 30
Q14. The cost of 5 chairs and 8 tables is Rs. 6,574. What is the cost of 10 chairs and 16 tables?
(a) Rs. 15,674
(b) Rs. 16,435
(c) Rs. 13,148
(d) Cannot be determined
Q15. 20 persons completed a job in 8 days. How many days will 16 persons take to complete the job?
(a) 10 days
(b) 11 days
(c) 12 days
(d) 8 days
SOLUTIONS:-
Sol 1. (c) 2b = a + c
2(3 + k) = 4 k = -1
Sol 2. (a) The middle number = sum of first six number + sum of last six number – sum of all 11 numbers = (6 × 36) + (6 × 42) – (11 × 40)
= 216 + 252 – 440 = 28
Sol 3. (d) 47 – [19 + {37 – 20}]
⇒ 47 – {19 + 17}
⇒ 47 – 36 ⇒ 11
Sol 4. (d) Arranging heights in ascending order 162, 163, 165, 172, 180, 180, 181
Median = n+1/2 th term (for n = odd)
Hence median = 172 (4th term)
Sol 5. (d) Let the three consecutive integers be x, x + 1 and x + 2 respectively.
3? + 3 = 30 ⇒ ? = 9
Largest integer = x + 2 = 9 + 2= 11
Sol 6. (c) 846 × 323 = 273258
Sol 7. (a) Effect = 20 – 10 – 20 ×10/100
= 20 – 10 – 2 = 8
Here 8 is +ive, so 8% increase
Sol 8. (b) A → 15 day
B → 25 day
A + B → 1/15 + 1/25 = 8/75
(A + B) can do work in 75/8 days
Sol 9. (d) 40/100 × ? = 480
x = 1200
So, 120% of x = 120/100 × 1200 = 1440
Sol 10. (b) Let the man’s age be 31 x years and that of his son be 13x years.
ATQ, 31x + 13x = 2 × 44
44? = 88 ⇒ ? = 88/44 = 2
Son’s age = 13x = 13 × 2 = 26 years
Sol 11. (d) Speed of train = Length of (train + platform)/Time taken to cross the platform
Speed of train is unknown. Hence, length can’t be determined.
Sol 12. (d) Actual cost price of cloth = Rs. (950 + 300) = Rs. 1250
To gain 30%, S.P. = Rs. (130/100 × 1250) = Rs. 1625
Sol 13. (d) Let the angles be 3x, 5x and 7x.
3? + 5? + 7? = 180°
15? = 180° ⇒ ? = 180/15 = 12°
∴ Smallest angle = 3 × 12 = 36°
Largest angle = 7 × 12 = 84°
∴ required difference = 2 × 36 – 84/2 = 72 − 42 = 30°
Sol 14. (c) 5 chairs + 8 tables = Rs. 6574
∴ 10 ?ℎ???? + 16 ?????? = 6574 × 2 = ??. 13148
Sol 15. (a) 20 persons do a job in → 8 day
1 person do a job in → 8 × 20 day
16 persons do a job → 8×20 16 = 10 days
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