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 Quantitative Aptitude - Arithmetic Ability Questions

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Q:

Sum of cubes of first n even natural numbers.

Answer

Proof of Sum of cubes of first n even natural numbers ::


sum_of_cubes_of_first_n_even_natural_numbers1556603651.png image


 


Hence, in other words, the sum of the first n cubes is the square of the sum of the first n natural numbers.

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Subject: Simplification Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Analyst , Bank Clerk , Bank PO

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Q:

Number of composite numbers lying between 67 and 101 is

A) 27 B) 24
C) 26 D) 23
 
Answer & Explanation Answer: A) 27

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Filed Under: Problems on Numbers
Exam Prep: Bank Exams

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Q:

A miner sells a diamond to a trader at a profit of 40% and the trader sells it to a customer at a profit of 25%. If the customer pays Rs 56 lakhs to buy the diamond, what had it cost the miner (in Rs lakhs)?

A) 30 B) 28
C) 25 D) 32
 
Answer & Explanation Answer: D) 32

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Filed Under: Profit and Loss
Exam Prep: Bank Exams

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Q:

A dishonest milkman buys milk at Rs 24 per litre and adds 1/3 of water to it and sells the mixture at Rs 32 per litre. What is his gain?

A) 33.33 percent B) 50 Percent
C) 77.78 percent D) 66.67 percent
 
Answer & Explanation Answer: C) 77.78 percent

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Filed Under: Profit and Loss
Exam Prep: Bank Exams

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Q:

In a class, 60% of children like Mathematics, 45% like Science and 25% like both Mathematics and Science. What is the percentage of children who like at least one subject?

A) 70% B) 80%
C) 45% D) 55%
 
Answer & Explanation Answer: B) 80%

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Filed Under: Percentage
Exam Prep: Bank Exams

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Q:

What is the smplified value of Sin2A/1+Cos2A ?

A) tan A B) cot A
C) sin A D) cos A
 
Answer & Explanation Answer: A) tan A

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Filed Under: Simplification
Exam Prep: AIEEE , Bank Exams , CAT

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Q:

Find out the odd word/letters/number/number pair from the given alternatives.

A) PD B) LE
C) IC D) DB
 
Answer & Explanation Answer: B) LE

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Filed Under: Odd Man Out
Exam Prep: Bank Exams

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Q:

In an examination, 35% of total students failed in Hindi, 45% failed in English and 20% failed in both. Find the percentage of those studnets who passed in both the subjects ?

A) 45% B) 35%
C) 20% D) 40%
 
Answer & Explanation Answer: D) 40%

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Filed Under: Percentage
Exam Prep: Bank Exams

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