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

- 10, 10, 20, 45, ?, 300
120225145110240Option D

The series is (*.5 + 5), (*1 + 10), (*1.5 + 15), (*2 + 20), (*2.5 + 25) - 480, 60, 420, 70, ?, 87.5
380280560350140Option D

The series is (÷8), (*7), (÷6), (*5), (÷4) - ?, 66, 136, 278, 564, 1138
4032203428Option B

The series is (*2 + 2), (*2 + 4), (*2 + 6), (*2 + 8), (*2 + 10) - 148, 166, 194, 212, 240, ?
250248320348258Option E

The series is (+18), (+28), (+18), (+28), +(18) - 25, 29, ?, 109, 365, 1389
5058384540Option D

The series is (+2^2), (+4^2), (+8^2) , (+16^2), (+32^2) - 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 days45 days32 days42 days38 daysOption 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 - 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 ?
280340400450500Option 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 - 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.
1520181025Option 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 - 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.
12501440155020002450Option D

Profit sharing ratio of Amit and Sumit = (7500 * 8) : (8000 * 6) = 5 : 4

Profit share of Amit = 3600 * 5/9 = 2000 - 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%