In a group of buffaloes and ducks, the number of legs is 24 more than twice the number of heads. What is the number of buffaloes?

Created: 9 months ago | Updated: 3 months ago

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Let the number of buffaloes be x and the number of ducks be y.

Each buffalo has 1 head & 4 legs.

Each duck has 1 head & 2 legs.

So the number of heads =x+y and the number of legs=4x+2y.

So, by the given condition,

4x+2y=2(x+y)+24

⇒4x−2x+2y−2y=24

⇒2x=24

⇒x=12

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Riaz spent 20% of his income on taxes and 20% of the remainder on rent . What percent of his income has he spent on rent ?

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Job Solution Bangladesh Bank Bangladesh Bank - Assistant Director - 2011 গণিত

1412

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Average of 17 even consecutive integers is 42. What is the third integer from the beginning of the series when the integers are arranged in an increasing sequence ?

Created: 9 months ago | Updated: 3 months ago

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Job Solution Bangladesh Bank Bangladesh Bank - Assistant Director - 2011 গণিত

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In the middle of around pool lies a water-lily . The water-lily doubles in size every day . After exactly 20 days the complete pool will be covered by the lily. After how days will half of the pool be covered by water-lily ?

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Job Solution Bangladesh Bank Bangladesh Bank - Assistant Director - 2011 গণিত

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Created: 9 months ago | Updated: 3 months ago

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Job Solution Bangladesh Bank Bangladesh Bank - Assistant Director - 2011 গণিত

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Unless the new reserves are found soon, the world's supply of coal is being depleted in such a way that with demand continuing to grow at present rates, reserves will be exhausted by the year 2050. Which of the following , if true , will weaken he above a

Created: 9 months ago | Updated: 3 months ago

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Job Solution Bangladesh Bank Bangladesh Bank - Assistant Director - 2011 গণিত

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