When simplified the product gives

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When simplified the product gives

A

B

C

D

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If the students of a class can be grouped exactly into 6

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If the students of a class can be grouped exactly into 6 or 8 or 10, then the minimum number of students in the class must be

A60

B120

C180

D240

Nithin K ? Dec 4 '2016 at 18:59

Answer :  120

Explanation:

Because the required number of students = LCM of 6, 8, 10 = 120. 

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the value of

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A2

B3.8

C0.6

D4.2

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Rs.750 are divided among A, B and C in such a manner that A

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Rs.750 are divided among A, B and C in such a manner that A : B = 5 : 2 and B : C = 7 : 13. What is A's share?

ARs.350

BRs.260

CRs.140

DRs.250

Nithin K ? Dec 4 '2016 at 18:40

Answer : Rs.350

Explanation:

\(A : B = 5 : 2 = \frac{5}{2} : 1, \)

\(B : C = 7 : 13 = 1 : \frac{13}{7} \)
\(A : B : C = \frac{5}{2} : 1 : \frac{13}{7} = 35 : 14 : 26 \)
 \(\therefore \text{ A's part }= 750 \times \frac{35}{75} = \text{Rs } 350\)

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Some articles were bought at 6 for Rs.5, and sold at 5 for

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Some articles were bought at 6 for Rs.5, and sold at 5 for Rs.6. Gain percentage is

A5%

B6%

C30%

D44%

Nithin K ? Dec 4 '2016 at 14:46

Answer : 44%

Explanation :

Suppose, number of articles bought = L.C.M. of 6 and 5 = 30.

C.P. of 30 articles = \(\frac{5}{6} \times 30 = 25. \)

S.P. of 30 articles = \(\frac{6}{5} \times 30 = 36 \)

\(Gain\% = \frac{11}{25} \times 100 \% = 44\%.\)

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The percentage increase in the area of a rectangle, if each

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The percentage increase in the area of a rectangle, if each of its sides is increased by 20% is

A40%

B42%

C44%

D46%

Nithin K ? Dec 4 '2016 at 14:38

Answer :  44%

Explanation:

Let original length = x metres and original breadth = y metres.
Original area = \(\text{xy }m^2\)

Increased length  \(= \frac{120}{100}x\)  and Increased breadth \(= \frac{120}{100}y\)

New area \(=\frac{120}{100}x \times \frac{120}{100}y\)

\(= \frac{36}{25}\text{xy } m^2\)

The difference between the Original area  and New area  is:

\(=\frac{36}{25}xy -xy\)  

\(=\frac{11}{25} xy\)

Increase %  \(= \frac{\frac{11}{25}xy}{xy} \times 100\)  

= 44%

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A truck covers a distance of 550 m in 1 min whereas a bus

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A truck covers a distance of 550 m in 1 min whereas a bus covers a distance of 33 km/s in 45 min. The ratio of their speeds is

A4:3

B3:5

C3:4

D50:3

Nithin K ? Dec 4 '2016 at 14:22

Answer: 3:4

Explanation:

Ratio of speeds = \(\Big(\frac{550}{60} \times \frac{18}{5}\Big): \Big(\frac{33}{45}\times60\Big)\)

= 33 : 44

= 3 : 4.

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