This Mock Test is specially designed for upcoming DSSSB Exams and drafted from the previous years papers held by DSSSB from 2018 to 2024.

Q.1 The average age of 40 students is 21 years. It was observed that while calculating the average age, the age of a student was taken as 20 years instead of 30 years. What will be the correct average age?

**1. 21.25 years**

2. 21.22 years

3. 12.12 years

4. 23.84 years

Q.2 What is the compound interest on (compounding annually) Rs. 14400 at the rate of 10 percent for 3 years?

1. Rs. 4214.8

2. Rs. 4712.6

3. Rs. 4812.6

**4. Rs. 4766.4**

Q.3 Each of the length, breadth and height of a cuboid is decreased by 12 percent. What is the percentage decrease in the total surface area of the cuboid?

1. 20.24 percent

2. 24.78 percent

3. 18.92 percent

**4. 22.56 percent**

Q.4 After giving a discount of 25 percent a cycle is sold for Rs. 7200. What is the marked price of the cycle?

1. Rs. 9500

2. Rs. 10000

3. Rs. 9000

**4. Rs. 9600**

Q.5 Simple interest and compound interest (compounding annually) on a principal at a certain rate of interest for 2 years is Rs. 28800 and Rs. 36000 respectively. What is the principal?

1. Rs. 30000

**2. Rs. 28800**

3. Rs. 29750

4. Rs. 28850

Q.6 A train of length 210 metres is running at a speed of 54 km/hr. In how much time it will completely cross a platform of 390 metres?

1. 50 seconds

2. 60 seconds

**3. 40 seconds**

4. 30 seconds

Q.7 What is the value of 33 ÷ 11 + 75 ÷ 5 × 2 – 6 ÷ 12 × 30?

1. 15

**2. 18**

3. 9

4. 42

Q.8 The breadth of a rectangular hall is 5/8 of its length. If the area of the floor is 160 Metre 2, then what is the difference between the length and breadth of the hall?

1. 8 metre

**2. 6 metre**

3. 10 metre

4. 4 metre

Q.9 X and Y together can complete a work in 60 days. Y and Z together can complete the same work in 90 days. If X, Y and Z all work together, then the same work gets completed in 45 days. How many days will X and Z together take to complete the same work?

1. 120 days

2. 90 days

**3. 60 days**

4. 150 days

Q.10 A truck left 8 hours early than the scheduled time and in order to reach its destination 600 km away on time, it had to decrease its usual speed by 20 km/hr. What is the usual speed of the truck?

1. 30 km/hr

**2. 50 km/hr**

3. 40 km/hr

4. 60 km/hr

Q.11 The simple interest on a sum for 11 years is Rs. 42000. The rate of interest for the first 4 years is 3 percent per annum and for the next 7 years is 9 percent per annum. What is the sum?

1. Rs. 70000

**2. Rs. 56000**

3. Rs. 60000

4. Rs. 58000

Q.12 If the third proportional to X and 90 is 180, then find the value of X.

1. 40

2. 30

3. 50

**4. 45**

Q.13 A shopkeeper marks his goods 22% above the cost price but allows a 32% discount for cash. Find his net loss percentage.

1. 18.25%

2. 13.22%

**3. 17.04%**

4. 16.02%

Q.14 If the fourth proportional to 24, X, and 48 is 88, then find the value of x.

1. 42

2. 36

**3. 44**

4. 40

Q.15 A can do a piece of work in 48 days. B is 60% more efficient than A. Find the number of days, it takes B to do the same piece of work.

1. 32 days

2. 35 days

**3. 30 days**

4. 40 days

Q.16 A drinking glass is in the shape of a frustum of a cone of height 21 cm. The diameters of its two circular ends are 8 cm and 4 cm. Find the capacity of the glass.

1. 625 cm3

2. 660 cm3

3. 420 cm3

**4. 616 cm3**

Q.17 The percentage profit earned by selling a laptop at ₹ 31,360 is equal to the percentage loss incurred by selling the same laptop for ₹ 13,440. At what price should the laptop be sold to make a 22% profit?

1. ₹ 24,522

2. ₹ 22,782

3. ₹ 28,560

**4. ₹ 27,328**

Q.18 Express 0.29999….. as a vulgar fraction.

1. 7/10

**2. 3/10**

3. 7/13

4. 3/13

Q.19 The H.C.F. of two numbers is 37 and the other two factors of their L.C.M. are 4 and 5. What is the larger of the two numbers?

A. 184

B. 180

**C. 185**

D. 181

Q.20 A boy can swim 4 km/hr in still water. If the velocity of the stream is 2 km/hr then find the time taken by her to swim to a place 12 km upstream and back.

A. 10 hours

B. 11 hours

C. 6 hours

**D. 8 hours**