Tag: math & puzzles

Questions Related to math & puzzles

Faucet A fills a tank in 3 hours, and faucet B drains the tank in 9 hours. What fraction of the tank will be filled, if both the faucets are kept running for 1½ hours, and the tank is originally empty?
general knowledge math & puzzles

  1. 1/4

  2. 1/3

  3. 1/2

  4. 2/3

  5. 3/4

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Correct Option: B

If ~X is the integer closest to the real number X, what is the value of the expression: ~4.3 + ~6.7 + ~(-0.9) ?
general knowledge math & puzzles

  1. 8

  2. 9

  3. 10

  4. 11

  5. 12

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Correct Option: C

A train travels at the rate of 10 miles/hr for the first hour of a trip, at 20 miles/hr for the second hour, at 30 miles/hr for the third hour and so on. How many hours will it take the train to complete a 450-mile journey? Assume that the train makes no intermediate stops.
general knowledge math & puzzles

  1. 8

  2. 8.5

  3. 9

  4. 9.5

  5. 10

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Correct Option: C

If a2 + 10b2 + c2 = 2b(3a + c), then which of the following is true? I. a = 3b II. a = b / 3 III. c = b IV. c = 3b V. c = a VI. c = a / 3
general knowledge math & puzzles

  1. Only I

  2. Only II

  3. Only III

  4. I, III and VI

  5. II, IV and V

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Correct Option: D

If 1/x < 1/y, then
general knowledge math & puzzles

  1. x < y

  2. x > y

  3. x < y if xy < 0

  4. x < y if xy > 0

  5. x > y if xy < 0

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Correct Option: C

'The Football Store' sells an average of 120 footballs per month in the first half of the year 2004. In the next 2 months, it sells an average of only 80 footballs per month. What is the average football sales for the first 8 months of 2004?
general knowledge math & puzzles

  1. 90

  2. 95

  3. 100

  4. 105

  5. 110

Show answer
Correct Option: E
Explanation:

To find the average football sales for the first 8 months of 2004, we need to calculate the total number of footballs sold in the first 8 months and then divide it by 8.

The average number of footballs sold in the first half of the year (6 months) is 120 per month. So the total number of footballs sold in the first 6 months is 120 * 6 = 720.

In the next 2 months, the average number of footballs sold is 80 per month. So the total number of footballs sold in the next 2 months is 80 * 2 = 160.

To find the average for the first 8 months, we add the total number of footballs sold in the first 6 months and the next 2 months, and then divide by 8.

Total number of footballs sold = 720 + 160 = 880.

Average football sales for the first 8 months = 880 / 8 = 110.

Therefore, the correct answer is E. 110.

The price of a pair of baseball gloves is increased by 15%. The next month, its price is further increased by 40%. This double increase in the price of the pair of baseball gloves would be equivalent to a single increase of
general knowledge math & puzzles

  1. 25%

  2. 49%

  3. 51%

  4. 55%

  5. 61%

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Correct Option: E

What is 0.003 x 0.07 as a percentage?
general knowledge math & puzzles

  1. 0.0021%

  2. 0.021%

  3. 0.21%

  4. 2.1%

  5. 21%

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Correct Option: B

11 to the power of 3 is
general knowledge math & puzzles

  1. 1313

  2. 3311

  3. 1331

  4. 3113

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Correct Option: C

last digit in 2 power 18 is
general knowledge math & puzzles

  1. 2

  2. 4

  3. 6

  4. 8

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Correct Option: B