Quiz Discussion

The average weight of a class of students is 67.5 kg. The weight of the class teacher is 25% more than the average weight of the class. The average weight of the class is less than the class teacher by x%. The value of x is:

• 1] 33.335
• 2] 25%
• 3] 20%
• 4] 22%

express 62.5% as a fraction

• 1]

  1/2

• 2]

  5/8

• 3]

  3/8

• 4]

  7/8

The price of rice falls by 20%. How much rice can be bought now with the money that was sufficient to buy 20 kg of rice previously?

• 1] 5 kg
• 2] 15 kg
• 3] 25 kg
• 4] 30 kg

The length, breadth and height of a room in the shape of a cuboid are increased by 10%, 20% and 50% respectively. Find the percentage change in the volume of the cuboid.

• 1] 77%
• 2] 75%
• 3] 88%
• 4] 98%
• 5] 99%

The ratio 5 : 4 expressed as a percent equals :

• 1]

  12.5 %

• 2]

  40 %

• 3]

  80 %

• 4]

  125 %

Half percent, written as a decimal, is

• 1] 0.2
• 2] 0.02
• 3] 0.005
• 4] 0.05

A student took five papers in an examination, where the full marks were the same for each paper. His marks in these papers were in the proportion of 6:7:8:9:10. In all papers together, the candidate obtained 60% of the total marks then, the number of papers in which he got more than 50% marks is

• 1] 1
• 2] 3
• 3] 4
• 4] 5
• 5] None of these

One bacterium splits into eight bacteria of the next generation. But due to environment, only 50% of one generation can produced the next generation. If the seventh generation number is 4096 million, what is the number in first generation?

• 1] 1 million
• 2] 2 million
• 3] 4 million
• 4] 8 million
• 5] None of these

What percent is 3% of 5% ?

• 1]

  60%

• 2]

  15%

• 3]

  50%

• 4]

  30%

Narayan spends 30% of his income on education and 50% of the remaining on food. He gives Rs. 1000 as monthly rent and now has Rs. 1800 left with him. What is his monthly income?

• 1] Rs. 8000
• 2] Rs. 7000
• 3] Rs. 9000
• 4] Rs. 6000