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Q:

In the following question a number series is given which has only one wrong number. You have to find out the wrong number?

7.5  47.5  87.5  157.5  247.5  357.5  487.5 

A) 47.5 B) 87.5
C) 247.5 D) 357.5
 
Answer & Explanation Answer: A) 47.5

Explanation:
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Filed Under: Problems on Numbers
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14 6419
Q:

The cost price of three varieties of mangoes namely M, N and O is Rs. 20/kg, Rs. 40/kg and Rs. 50/kg respectively. Find the selling price of one kg of mango in which these three varieties of mangoes are mixed in the ratio of 2 : 3 : 5 such that there is a net profit of 20%?

A) Rs. 47 B) Rs. 49.2
C) Rs. 48.5 D) Rs. 50.3
 
Answer & Explanation Answer: B) Rs. 49.2

Explanation:

Total cost of all varieties of mangoes = 20 x 2 + 40 x 3 + 50 x 5 = 40 + 120 + 250 = Rs. 410

Then, cost of 1 kg mangoes = 410/10 = Rs. 41

To get 20% profit,

The rate at which the mangoes should be sell = 120/100 x 41 = Rs. 49.2

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Filed Under: Profit and Loss
Exam Prep: AIEEE , Bank Exams , CAT
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15 6417
Q:

A shopkeeper’s earning increases by 25% in first year but decreases by 4% in the next and so on. After 5 years his total earnings would be Rs. 72,000. What is his present earning?

A) Rs. 40,000 B) Rs. 45,000
C) Rs. 42,000 D) Rs. 46,000
 
Answer & Explanation Answer: A) Rs. 40,000

Explanation:

Let his present earnings be Rs. p

ATQ,

(125/100) x (96/100) x (125/100) x (96/100) x (125/100) x p = 72000

p = Rs. 40,000.

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Filed Under: Percentage
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27 6416
Q:

Which acid is present in tomato?

A) Sulphuric acid B) HCl
C) Both A & B D) Citric acid
 
Answer & Explanation Answer: D) Citric acid

Explanation:

which_acid_is_present_in_tomato1542371895.jpg image

Citric acid is present in tomatoes.

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Filed Under: Chemistry
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2 6414
Q:

Raghu can do a job in 12 days alone and Sam can do the same job in 15 days alone. A third person Aru whose efficiency is two-third of efficiency of both Ram and Shyam together, can do the same job in how many days alone?

A) 10 B) 12
C) 13 D) 15
 
Answer & Explanation Answer: A) 10

Explanation:

One day work of Raghu and Sam together = 1/12 + 1/15 = 9/60 = 3/20

Aru efficiency = 2/3 of (Raghu + Sam)

Number of days required for Aru to do thw work alone = 3/2 x 20/3 = 10 days. 

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Filed Under: Time and Work
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9 6411
Q:

A by product of involuntary muscle contraction and relaxation is

A) Oxygen B) Water
C) Heat D) Nitrogen
 
Answer & Explanation Answer: C) Heat

Explanation:

A_by_product_of_involuntary_muscle_contraction_and_relaxation_is1537166589.jpg image

When a muscle is contracted and relaxed some amount of heat is released as a by product. 

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Filed Under: Chemistry
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2 6407
Q:

What element behaves most like magnesium?

A) Silicon B) Strontium
C) Sulphur D) Tin
 
Answer & Explanation Answer: B) Strontium

Explanation:

We know that, Elements in the same group of the periodic table have similar characteristics.

Here Magnesium and Strontium shared some similar properties because they both belong to the same group. Sr is the chemical symbol for strontium which is a group two element; it has atomic number of 38. 

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Filed Under: Chemistry
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5 6405
Q:

Who is known as "Iron Lady of India"? 

A) Rani Laxmi Bai B) Sonia Gandhi
C) Indira Gandhi D) None of the above
 
Answer & Explanation Answer: C) Indira Gandhi

Explanation:

Indira Gandhi the first Prime Minister of India is known as the Iron Lady of India.

Who_is_known_as_Iron_Lady_of_India1542609309.jpg image

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Filed Under: Indian History
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9 6395