20% raise of price followed by a discount of 25% of the raised p

Subject

Quantitative Aptitude

Class

SSCCGL Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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111.

20% raise of price followed by a discount of 25% of the raised portion will

  • increase the price by 10%

  • decrease the price by 5%

  • increases the price by 15%

  • increases the price by 15%


C.

increases the price by 15%

Let original cost of the object be ₹ 100.
If 20% raised in price, then cost of the object  = ₹ 120
Cost increased  = ₹ (120 - 100)
                       = ₹ 20
∴ Discount on increased cost
                        = 25% of 20
                        space equals space 25 over 100 cross times 20 space equals space ₹ space 5
∴        New cost = ₹ (120 - 5) = ₹ 115
Hence, 15% cost will be increased.

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112.

The sum of the ages of two brothers, having a difference of 8yr between them, will double after 10 yr. What is the ratio of the age of the younger brother to that of the elder brother?

  • 7 : 11

  • 3 : 7

  • 8 : 9 

  • 8 : 9 

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113.

The ratio of two numbers is 3 : 4 and their LCM is 180. The second number is

  • 60

  • 45

  • 90

  • 90

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114.

Out of 30 teachers of a school, a teacher of age of 60 yr retired. In his place another teacher of age 30 yr was appointed. As a result, the mean age of the teacher will

  • decrease by 6 months

  • decrease by 1 yr

  • remain same

  • remain same

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115.

Average age of A, B and C is 84 yr. When D joins them the average age becomes 80 yr. A new person E, whose age is 4 yr more than D, replaces A and the average of B, C, D and E becomes 78 yr. What is the age of A?

  • 60 yr

  • 70 yr

  • 80 yr

  • 50 yr

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116.

By selling an article for ₹ 450, a man loses 10%. The gain or loss per cent if he sells it for ₹ 540 is

  • loss 8%

  • gain 9%

  • loss 9%

  • loss 9%

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117.

A man loses 20 1 half percent sign of his money and after spending 80% of the remainder, he is left with ₹ 159. How much did he have at first?

  • ₹ 500

  • ₹ 800

  • ₹ 1000

  • ₹ 1000

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118.

A gun is fired at a distance of 1.34 km from Geeta. She hears the sound after 4 s. The speed at which sound travels is

  • 335 m/s

  • 330 m/s

  • 300 m/s

  • 300 m/s

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119.

If I walk at 5km/h, I miss a train by 7 min. However, if I walk at 6 km/h I reach the station 5 min before the departure of the train. The distance between my house and the station is

  • 6.5 km

  • 7 km

  • 6 km

  • 6 km

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120.

The compound interest on ₹ 1800 at 10% per annum for a certain period of time is ₹ 378. Find the time (in yr).

  • 2.8

  • 3.0

  • 2.5

  • 2.5

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