GATE Questions

Q:

Arun is a cashew merchant in Telangana. He has cashews in sealed wooden boxes of 10kg each. The price of the cashew increases by Rs.20 per kg for every year, but at the same time, 10% of the cashews are eaten by rodents every year. If the price of a 1 kg of fresh cashew is Rs.120, what is the change in his profits if he sells a sealed box after one year of storage, rather than selling it fresh ? (In Rs.)

A) Rs. 60 B) Rs. 54
C) Rs. 80 D) Rs. 75
 
Answer & Explanation Answer: A) Rs. 60

Explanation:

Price of 1kg fresh cashew = Rs.120
Therefore, price of 10kg = Rs.120 x 10 = Rs.1200

10% of 10kg which eaten by rodents = 10 x 10/100 = 1kg.

So, End of Year he had 10kg - 1kg = 9kg

So, he sells that 9kg with Rs.20 per kg profit = 9 x 140 = 1260.

He buy 10kg wooden box with cashew for Rs.1200 and sell that for Rs. 1260

So, profit = 1260 - 1200 = Rs.60 more money he get.

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Q:

One girl can eat 112 chocolates in half a minute, and her boy friend can eat half as many in twice the length of time. How many chocolates can both boy and girl eat in 12 seconds ?

A) 44 B) 32
C) 56 D) 49
 
Answer & Explanation Answer: C) 56

Explanation:

Girl eats 112 chocolates in 30 sec

so she can eat in 12 sec is 12 x 112/30 = 44.8 chocolates.

 

Her boy friend can eat one-half of 112 in twice of 30 sec

so he can eat 56 in 60 sec


Then he can eat in 12 sec is 56 x 12/60 = 11.2 chocolates.

 

Hence, together they can eat = 44.8 + 11.2 =56 chocolates in 12 seconds.

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Filed Under: Time and Work
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Q:

Find the one which does not belong to that group ?

A) America : Dollar B) India : Rupee
C) Australia : Pound D) Japan : Yen
 
Answer & Explanation Answer: C) Australia : Pound

Explanation:

Except Austriala : Pound, all others are correction combination of country and its currency.

Australian currency is Australian Dollar.

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Filed Under: Analogy
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Q:

Materials that allow electricity to flow are called

A) Insulators B) Conductors
C) Electron flows D) Stimulators
 
Answer & Explanation Answer: B) Conductors

Explanation:

Materials that allow electricity to flow are called electrical conductors and that materials which does not allow electricity to flow are called Insulators.

materials_that_allow_electricity_to_flow_are_called1535107310.png image

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Q:

Which process allows water to enter the atmosphere?

A) Transpiration B) Respiration
C) Condensation D) Evaporation
 
Answer & Explanation Answer: D) Evaporation

Explanation:

Evaporation is the process that allows water to enter into the atmosphere.

Sunlight turns liquid water into water vapor which then rises higher into the atmosphere and forms into clouds.

 

Plants, too, help water get into the atmosphere through a process called transpiration.

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Q:

Identify the metalloid in the following list?

A) Silicon B) Sulphur
C) Scandium D) All of the above
 
Answer & Explanation Answer: A) Silicon

Explanation:

A metalloid is an element with properties between metals and non metals or the mix of both.

The six metalloids are arsenic, silicon, germanium, boron, antimony and tellurium.

 

Hence, silicon is the only metalloid in the given list.

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Filed Under: Chemistry
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Q:

DNA is made of repeating units called

A) Nucleotides B) Ribozomes
C) Peptides D) Aminoacids
 
Answer & Explanation Answer: A) Nucleotides

Explanation:

DNA is a very long chain polymer made up of thousands of repeating units called nucleotides.

 

Nucleotide Unit is composed of a phosphate group, a pentose sugar, and a nitrogenous base.

 

The sides of the DNA ladder are made up of alternating deoxyribose sugar -- phosphate group units.

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Filed Under: Biology
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Q:

Atomic mass of first 30 elements?

Answer

Here I give you the first 30 Atomic elements names and their Atomic masses.


 


Atomic number      Element        Atomic mass
                             


        1                 Hydrogen           1


        2                  Helium              4


        3                 Lithium              6.94


        4                Beryllium            9.01


        5                  Boron               10.81


        6                Carbon               12.01


        7                Nitrogen             14.01


        8                Oxygen              15.99


        9                Fluorine              19.00


       10                Neon                 20.18


       11               Sodium               22.99


       12             Magnesium           25.31


       13             Aluminium            26.98


       14               Silicon                28.09


       15             Phosphorus           30.97


       16               Sulphur               32.07


       17               Chlorine              35.45


       18                Argon                 39.95


       19             Potassium              39.10


       20              Calcium                40.08


       21             Scandium              44.96


       22             Titanium               47.87


       23            Vanadium              50.94


       24             Chromium            24. 52


       25            Manganese            54.94


       26                Iron                  55.85


       27              Cobalt                 58.93


       28               Nickel                 58.69


       29              Copper                 63.55


       30                Zinc                   65.41

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