Aptitude and Reasoning Questions

Q:

cos3A is equal to

A) cos3A - 3sin2cosA B) cos3A + 4sin2cosA
C) cos3A + 3sin2cosA D) cos3A - 4sin2cosA
 
Answer & Explanation Answer: C) cos3A + 3sin2cosA

Explanation:
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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

The ratio of the ages of two boys is 3:4. After 3 years, the ratio will be 4:5.The ratio of their ages after 21 years will be

A) 14:17 B) 17:19
C) 11:12 D) 10:11
 
Answer & Explanation Answer: D) 10:11

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Filed Under: Ratios and Proportions
Exam Prep: Bank Exams

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Q:

In how many different ways can the letters of the word 'RITUAL' be arranged?

A) 720 B) 5040
C) 360 D) 180
 
Answer & Explanation Answer: A) 720

Explanation:

The number of letters in the given word RITUAL = 6

Then, 

Required number of different ways can the letters of the word 'RITUAL' be arranged = 6!

=> 6 x 5 x 4 x 3 x 2 x 1 = 720

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Filed Under: Permutations and Combinations
Exam Prep: AIEEE , Bank Exams , CAT , GATE
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Q:

From the given words, select the word which cannot be formed using the letters of the given word.
MOTLIEST

A) SMITE B) MINES
C) TILES D) EMITS
 
Answer & Explanation Answer: B) MINES

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Filed Under: Logical Sequence of Words
Exam Prep: Bank Exams

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Q:

The minimum value of LCM of given numbers is ........... the product of all the given numbers.

A) always greater than B) always less than
C) always equal to D) None
 
Answer & Explanation Answer: D) None

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Filed Under: HCF and LCM
Exam Prep: Bank Exams

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Q:

Which of the following activities are examples of data gathering?

A) Counting the votes in an election to determine the next governor B) Making a pie chart showing the kinds of television sets owned by people in a sample of 1,000
C) Finding the mean weight of cancer patients in a study D) Using the results of a mathematical model to predict the next day's weather
 
Answer & Explanation Answer: A) Counting the votes in an election to determine the next governor

Explanation:

Option A) "Counting the votes in an election to determine the next governor"  is the only one where data gathering is done.

 

In all other options, data is already collected and now analyzing of data is going on.

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Q:

If (1 + secA)/tanA = x, then x is

A) cot(A/2) B) tan(A/2)
C) cosec(A/2) D) sec(A/2)
 
Answer & Explanation Answer: A) cot(A/2)

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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

In a certain code GIVE is written as VIEG and OVER is written as EVRO. How will DISK be written in that code?

A) SIDK B) KISD
C) KDSI D) SIKD
 
Answer & Explanation Answer: D) SIKD

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Filed Under: Coding and Decoding
Exam Prep: Bank Exams

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