Tag: math & puzzles

Questions Related to math & puzzles

In a Java code there are several number of classes & each classes have several methods in it. If the number of classes is decreased by 2 then each class would have 1 method more to keep the total number of methods the same. How many classes are there in that code?

general knowledge math & puzzles

  1. 8

  2. 6

  3. 5

  4. 4

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Correct Option: A

A train is coming towards a cat, seating in a 30m long tunnel.The Cat is 10m away from that end of the tunnel from where the train is entering the tunnel.If the Cat starts to run towards the train it will meet the train just at the end of the tunnel & if the cat starts to run opposite to the train then also it will meet the train on the opposite end of the tunnel.If the speed of the train is 36mile/hour, than the speed of the cat is..
general knowledge math & puzzles

  1. 24 mile/hour

  2. 36 m/sec

  3. 18 mile/hour

  4. 12 mile/hour

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Correct Option: D

How many 4 digit numbers can be formed using the digits 0,9,1,8,2. repetition of the digits is not allowed.

general knowledge math & puzzles

  1. 48

  2. 4!

  3. 5*4!

  4. 96

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Correct Option: D

How many unique 5 letter words can be formed using the letters A,E,I,O,U where all the vowels will be together. repetition of a letter is not allowed.
general knowledge math & puzzles

  1. 96

  2. 48

  3. 120

  4. 0

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Correct Option: C

1,1,4,8,9,27,16,64

general knowledge math & puzzles

  1. 25

  2. 125

  3. 81

  4. 36

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Correct Option: A

1,2,6,24,120
general knowledge math & puzzles

  1. 600

  2. 1440

  3. 360

  4. 720

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Correct Option: D

7,19,37,61

general knowledge math & puzzles

  1. 121

  2. 91

  3. 85

  4. 99

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Correct Option: B

0,6,24,60,120

general knowledge math & puzzles

  1. 180

  2. 210

  3. 186

  4. 216

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Correct Option: B

A,D,I,P

general knowledge math & puzzles

  1. W

  2. X

  3. Y

  4. S

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Correct Option: C

2,12,30,56
general knowledge math & puzzles

  1. 90

  2. 82

  3. 74

  4. 66

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Correct Option: A