Tag: math & puzzles

Questions Related to math & puzzles

The sum of four consecutive counting numbers is 154. Find the smallest number:
general knowledge math & puzzles

  1. 36

  2. 37

  3. 38

  4. 31

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Correct Option: B

Rs. 1581 is divided among A, B and C in the ratio 10 : 15 : 6. What is the share of B?
general knowledge math & puzzles

  1. 306

  2. 765

  3. 700

  4. 510

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Correct Option: B

The angle between the minute hand and the hour hand of a clock, when the time is 8.30
general knowledge math & puzzles

  1. 800

  2. 600

  3. 1050

  4. 750

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Correct Option: D

20% of 5 + 5% of 20 =
general knowledge math & puzzles

  1. 5

  2. 2

  3. 6

  4. 21

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Correct Option: B

A number consists of 20 plus 20% of its value. The number is:
general knowledge math & puzzles

  1. 20

  2. 22

  3. 25

  4. 30

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Correct Option: C
Explanation:

To solve this problem, the user needs to know how to convert a percentage to a decimal and how to solve basic algebraic expressions.

Let x be the unknown number. The problem states that this number is equal to 20 plus 20% of its value.

Thus, we can write the following equation:

x = 20 + 0.2x

Simplifying this expression by subtracting 0.2x from both sides:

0.8x = 20

Dividing both sides by 0.8:

x = 25

Therefore, the correct answer is:

The Answer is: C. 25

Find the next term of the series: 3, 6, 9, 18, 27, 54, ......
general knowledge math & puzzles

  1. 81

  2. 69

  3. 63

  4. 57

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Correct Option: A

Find the area of a right angled triangle whose hypotenuse is 10 cm and base 8 cm.
general knowledge math & puzzles

  1. 48

  2. 34

  3. 24

  4. 42

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Correct Option: C

A student was asked to add 16 and subtract 10 from a number.He by mistake added 10 and subtracted 16. If his answer is 14 what is the correct answer?
general knowledge math & puzzles

  1. 20

  2. 26

  3. 30

  4. 32

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Correct Option: C

Speed of a boat in still water is 9 km/hr. It goes 12 km down stream and comes back to the starting point in three hours.What is the speed of water in the stream?
general knowledge math & puzzles

  1. 3

  2. 4

  3. 4.5

  4. 5

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Correct Option: C

How many integral solutions (x,y) does the equation x^y = xy have?
general knowledge math & puzzles

  1. 1

  2. 2

  3. 3

  4. 4

  5. More than 4

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Correct Option: E