## 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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