Quant Test for SBI Clerk Prelims 2021 Exam set – 9

Directions: What will come in place of questions (?) marks in the given number series ?

1. 10, 10, 20, 45, ?, 300
   120
   225
   145
   110
   240
   Option D
   The series is (*.5 + 5), (*1 + 10), (*1.5 + 15), (*2 + 20), (*2.5 + 25)

    

2. 480, 60, 420, 70, ?, 87.5
   380
   280
   560
   350
   140
   Option D
   The series is (÷8), (*7), (÷6), (*5), (÷4)

    

3. ?, 66, 136, 278, 564, 1138
   40
   32
   20
   34
   28
   Option B
   The series is (*2 + 2), (*2 + 4), (*2 + 6), (*2 + 8), (*2 + 10)

    

4. 148, 166, 194, 212, 240, ?
   250
   248
   320
   348
   258
   Option E
   The series is (+18), (+28), (+18), (+28), +(18)

    

5. 25, 29, ?, 109, 365, 1389
   50
   58
   38
   45
   40
   Option D
   The series is (+2^2), (+4^2), (+8^2) , (+16^2), (+32^2)

    

6. A and B together can finish the work in 20 days. A alone can finish the same work in 35 days. In how many days will B alone can do 90% of the same work ?
   48 days
   45 days
   32 days
   42 days
   38 days
   Option D
   LCM of 20 and 35 = 140
   Total work = 140
   efficiency of A+B together = 140/20 = 7
   efficiency of A = 140/35 = 4
   efficiency of B = 7 – 4 = 3
   time taken by B to do 90% of the work = 140/3 * 90/100 = 42 days

    

7. The profit earned after selling a mobile cover for rs.455 is the same as loss incurred after selling the same mobile cover for rs.225. What is the cost price of the mobile cover ?
   280
   340
   400
   450
   500
   Option B
   Let the cost price of the mobile cover be x.
   selling price = rs.455
   profit = 455 – x
   selling price = rs.225
   loss = x – 225
   455 – x = x – 225
   2x = 680 , x = 340

    

8. The ratio of downstream speed to upstream speed of the boat is 5 : 3. If the speed of boat in still water is 20 km/hr, then what will be the time taken by boat to cover the distance of 150 km in downstream speed and 60km in upstream speed.
   15
   20
   18
   10
   25
   Option D
   Let speed of boat in still water = 5x
   speed of stream = 3x =
   downstream speed = 5x + 3x/2 = 4x
   upstream speed = 5x – 3x/2 = x
   speed of boat in still water = 20 km/hr
   4x = 20 km/hr
   x = 5 km/hr
   Total time required = 150/5 *5 + 60/5*3
   = 150/25 + 60/15 = 6 + 4 = 10 hours

    

9. Amit and Sumit invested rs.7500 and rs.8000 for 8 months and 6 months respectively. If they earned total profit is rs.3600 then find the profit share of Amit.
   1250
   1440
   1550
   2000
   2450
   Option D
   Profit sharing ratio of Amit and Sumit = (7500 * 8) : (8000 * 6) = 5 : 4
   Profit share of Amit = 3600 * 5/9 = 2000

    

10. Monthly salary of Ram is rs.15000 and total monthly expenditure is 80% of monthly salary. If Ram’s salary is increased by 20%, then by what percent savings of Ram must be increased ?
    25%
    15%
    40%
    20%
    32%
    Option D
    Monthly salary of Ram = 15000
    Expenditures = 15000 * 80/100 = 12000
    savings of Ram = 15000 – 12000 = 3000
    The salary of Ram after 20% increased = 15000 * 120/100 = 18000
    expenditure = 18000 * 80/100 = 14400
    saving of Ram = 18000 – 14400 = 3600
    Percentage increased in saving = 600/3000 * 100 = 20%