- Work done by A in one day is four times the work done by B in one day, while the work done by B in one

day is one-third of the work done by C in one day. C alone can complete the work in 16 days. In how

many days can all the three together complete the work?53864Option D

C = 16 days

B = 3(16)= 48 days

A = 48/4 = 12 days

All of them = 1/[1/16+1/48+1/12] = 6 days - A and B started a business with initial investments in the ratio 5 : 7. If after one year their profits were in the ratio 1 : 2 and the period for A’s investment was 7 months, B invested the money for?

1210131611`Option B

Let initial investments be 5x and 7x.

Let B invested money for months y months

(5x+7)/(7x*y) = ½

=>y = 10 months - A tap can empty a tank in one hour. A second tap can empty it in 30 min. If both the taps operate simultaneously, how much time is needed to empty the tank?

4030205060Option C

Required time = 1/[1/60+1/30] = 20 min. - Suhas decided to donate 15% of his salary. On the day of donation he changed his mind and donated Rs.1,650 which was 11/15th of what he had decided to donate earlier. How much is Suhas’ salary?

11001500100014001600Option B

11/15*15/100*x = 1650

=>x = Rs.1500 - Three numbers are A,B and C are in the ratio 1:2:3 and their average is 600.if A is increases by 10% and B is decrease by 20%,then the average increased by 5%, C will be increase by ?

910161312Option A

sum of A, B and C = 600 × 3 = 1800

A = 300, B = 600, C = 900

Now A = 330, B = 480

Average = 630

630 × 3 = 330 + 480 + C

C = 1080

C will be increased by 180

7802 + 132 − 8963 + 1326 =?×33

=>9260 – 8963 = ? × 33

=>? = 297/33 = 9 - 21.9% of 650 = ? + 23.12
100115119120125Option C

21.9% of 650 = ? + 23.12

=>142.35 = ? + 23.12

=>? = 119.23 == 119 - 14.5% of 740 – ?% of 320 = 87.3
78964Option D

14.5% of 740 – ?% of 320 = 87.3

107.3 – 87.3 = ?/ 100 ×320

=>? = 20×100/320 = 6.25 == 6 - 7802 + 132 − 8963 + 1326 =?×33
141113910Option D

7802 + 132 − 8963 + 1326 =?×33

=>9260 – 8963 = ? × 33

=>? = 297/33 = 9 - 85% of 420 + ?% of 1080 = 735
3120443935Option E

85% of 420 + ?% of 1080 = 735

=>85/ 100 ×420 + 𝑥/100 ×1080 = 735

=> x = 35 - 30% of 1225 – 64% of 555 = ?
1516141213Option D

30% of 1225 – 64% of 555 = ?

=>? = 367.5 – 355.2 = 12.3 ==12

**Directions(6-10):** What approximate value will come in place of question mark ‘?’ in the following questions.