- In a jewelry jewels will be rejected if it is 0.05% manufacturing defect. Then how many grams they should examine to reject 2 grams of jewels?
40003000200015004500Option A

Let x be the grams to examine.

0.05% of x = 2grams.

0.05 /100 X x = 2

x = 2 x 100/0.05 => x = 4000.

So 4000 grams to examine to reject 2grams. - Sunil planned to deposits his money in a bank at 20% compound interest .How many years will take the deposits amount tripled?
56784Option C

C.I >3P ( p- principal amt) ( tripled)

=> P ( 1+ r/100)n > 3P

=> ( 1+ r/100)n > 3

=> ( 1+ 20/100)n > 3

=> ( 120/100)n > 3

=> ( 6/5)n > 3

When n= 7 ie) (6/5)7 > 3 ..Therefore 7 years after he will get the tripled amount. - A girl decided to read a book of 1000 pages in 20 days, reading 5hrs/day. How many days will she take to read a book of 1500 days with a rate of 2hrs/day?
50 days75 days65 days70 days60 daysOption B

1 day= 5hrs=> 20 days = 20 x 5=100hrs

ie) she can read 1000 pages in 100 hrs.

so for 1 hr = 1000/100 = 10 pages she can complete.

Then 2 hrs , 20 pages she can complete.

Per day 20 pages , then for 1500 pages = 1500/20 = 75 days to complete. - 27.92% of 425.02-24.03% of 299.97= (?)
Option

Substituting (?) with “x”

x=28%×425-24%×300

x =119 – 72

x=47 - If 5 years before the ratio of ages of daughter and father is 3 : 15. After 5 years from now the ratio will become 8: 20. Then Find out the

age of the father?25 years40 years35 years45 years30 yearsOption C

Let the age of daughter before 5 years= 3x

Let the age of father before 5 years = 15x

Then , (3x + 10/15x+10) = 8/20

=>x=2

So age of father before 5 years= 15x= 15*2 = 30 years

present age = 30+ 5= 35 years - Seetha scored 60 % of marks in Hindi, 70% marks in Science and ” M” marks in Maths.If Maximum marks of each subject is 150 and he scored 70% marks.

Then find the marks he scored in Maths?

110120130125135Option B

Marks in Hindi = 60/100 * 150 = 90

Marks in Science = 70/100 * 150 = 105

Total marks in 3 subjects = 70/100 * 450 =315

so 90 + 105 +M = 315

=> M= 120 - Raju bought a LED T.V and got diwali discount 10% on marked price. The showroom got 4% profit .If Raju paid Rs. 40,000,

then find the marked price of the T.V?

Rs.45,000Rs.42,006Rs.46,000Rs.46,222Rs.43,000Option D

selling price= 104/ 100 * 40, 000 = Rs. 41,600

Let the marked price be x.

So,90 % of x = Rs.41,600

So 100 % of x= (41,600/ 90) * 100 =Rs.46,222 - From a group of 6 soldiers and 4 police a committee of 5 people is formed for emergency rescue operation.

The committee is to be formed having atleat 3 soldiers.Find the number of possible ways?

160170186179125Option C

(6C3 * 4C2) + ( 6C4 * 4C1 ) + 6C5 = 120 +60 + 6 = 186 - A circular frame is inserted in a square frame of area 16 metre square.

So what is the area of the part of square frame outside the circle?

2.454.563.435.891.25Option C

Let the side of the square frame = a meter

area = a 2 = 16

=> a= 4 m

=>diameter of a circular frame = 4m

=> radius= 2m

area = 22/ 7 * 2 * 2 =12.57

So remaing outer area= 16- 12.57=3.43m 2 - Inlet pipe 1 is 6 times more efficient than inlet pipe 2 to fill the tank.If inlet pipe 1 can fill the tank in 32 min,

then how much time is taken by both pipes to fill the tank when both the pipes are opened?24 min36min20min16 min28 minOption E

Let efficiency of pipe 1= 7x

efficiency of pipe 2= x

Let both the pipes together can fill the tank in t min

=>7x * 32 = ( 7x+ x) t

=>t = 28 min

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