Tag: math & puzzles

Questions Related to math & puzzles

A and B can do a piece of work in 45 days and 40 days respectively. They began to do the work together but A leaves after some days and then B completed the remaining work n 23 days. The number of days after which A left the work was

general knowledge math & puzzles

  1. 9

  2. 11

  3. 12

  4. 15

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Correct Option: A

A shop keeper sold a T.V set for Rs.17,940 with a discount of 8% and earned a profit of 19.6%.What would have been the percentage of profit earned if no discount was offered?

general knowledge math & puzzles

  1. 24.8%

  2. 25%

  3. 26.4%

  4. None of these

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Correct Option: D

A clock is set right at 8 a.m. The clock gains 10 minutes in 24 hours. What will be the true time when the clock indicates 1 p.m. on the following day?

general knowledge math & puzzles

  1. 48 min. past 12

  2. 38 min. past 12

  3. 28 min. past 12

  4. 25 min. past 12

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Correct Option: A

What is the missing number in this series? 8 2 14 6 11 ? 14 6 18 12

general knowledge math & puzzles

  1. 16

  2. 9

  3. 15

  4. 6

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Correct Option: B

Dinesh travelled 1200 km by air which formed 2/5 of his trip. One third of the whole trip, he travelled by car and the rest of the journey he performed by train. What was the distance travelled by train?

general knowledge math & puzzles

  1. 600Km

  2. 700Km

  3. 800Km

  4. 900Km

Show answer
Correct Option: C

AI Explanation

To solve this problem, we need to find the distance travelled by train.

Given that Dinesh travelled 1200 km by air, which formed 2/5 of his trip, we can find the total distance of his trip by multiplying 1200 km by 5/2.

Total distance of the trip = (1200 km) * (5/2) = 3000 km.

Next, we are told that one-third of the whole trip, Dinesh travelled by car. To find the distance travelled by car, we can multiply the total distance of the trip by 1/3.

Distance travelled by car = (3000 km) * (1/3) = 1000 km.

Finally, the distance travelled by train is the remaining distance after subtracting the distance travelled by air and the distance travelled by car from the total distance of the trip.

Distance travelled by train = Total distance of the trip - Distance travelled by air - Distance travelled by car = 3000 km - 1200 km - 1000 km = 800 km.

Therefore, the distance travelled by train is 800 km, which corresponds to option C.

A train which travels at a uniform speed due to some mechanical fault after traveling for an hour goes at 3/5th of the original speed and reaches the destination 2 hrs late.If the fault had occurred after traveling another 50 miles the train would have reached 40 min earlier. What is distance between the two stations.
general knowledge math & puzzles

  1. 300

  2. 310

  3. 320

  4. 305

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Correct Option: A

The average between a two digit number and the number obtained by interchanging the digits is 9. What is the difference between the two digits of the number?
general knowledge math & puzzles

  1. 8

  2. 2

  3. 5

  4. Cannot be determined

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Correct Option: D

Pipe A can fill in 20 minutes and Pipe B in 30 mins and Pipe C can empty the same in 40 mins.If all of them work together, find the time taken to fill the tank

general knowledge math & puzzles

  1. 17 1/7 mins

  2. 20 mins

  3. 8 mins

  4. none of these

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Correct Option: A

If the radius of a circle is diminished by 10%, then its area is diminished by:
general knowledge math & puzzles

  1. 10%

  2. 19%

  3. 20%

  4. 36%

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Correct Option: B

A boat travels 20 kms upstream in 6 hrs and 18 kms downstream in 4 hrs.Find the speed of the boat in still water and the speed of the water current?
general knowledge math & puzzles

  1. 1/2 kmph

  2. 7/12 kmph

  3. 5 kmph

  4. none of these

Show answer
Correct Option: B