Quantitative Aptitude - Arithmetic Ability Questions

Q:

Among three numbers, the first is twice the second and thrice the third. If the average of three numbers is 396, then what is the difference between the first and the third number?

A) 594 B) 448
C) 432 D) 453
 
Answer & Explanation Answer: C) 432

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Filed Under: Average
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Q:

In the following question, select the odd number group from the given alternatives.

A) (143, 64) B) (232, 49)
C) (719, 289) D) (462, 169)
 
Answer & Explanation Answer: D) (462, 169)

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Q:

Δ DEF is right angled at E. If m∠D = 45%., then Cosec F =

A) 1/2 B) 1/√2
C) √2 D) 1/√3
 
Answer & Explanation Answer: C) √2

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Q:

If cosπ/4c - tanπ/4c = x, then x is

A) (√3+4)/2√3 B) (2√2-1)/2
C) (1-√2)/√2 D) 5/√3
 
Answer & Explanation Answer: C) (1-√2)/√2

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Q:

If P = 5X and Q = X, then P is how much percentage more than Q?

A) 80 B) 320
C) 500 D) 400
 
Answer & Explanation Answer: D) 400

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Filed Under: Percentage
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Q:

In the following question, select the odd word pair from the given alternatives.

A) Figure – Rectangle B) Ornament – Ring
C) Vehicle – Scooter D) Necklace – Ornament
 
Answer & Explanation Answer: D) Necklace – Ornament

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Q:

In an alloy of German silver the ratio of copper to zinc was 17:7 while that of nickel to zinc was 4 :3. The ratio of copper to zinc to nickel in the alloy was

A) 17 : 21 : 4 B) 51 : 21 : 28
C) 68 : 28 : 21 D) 17 : 28 : 3
 
Answer & Explanation Answer: B) 51 : 21 : 28

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Filed Under: Ratios and Proportions
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Q:

In each of these questions, a question is given followed by information in three statements. You have to find out the data in which statement(s) is sufficient to answer the question and mark your answer accordingly. What are the marks scored by Abhijit in English?

I. Marks scored by Abhijit in Maths are more than his marks in Science by 20.

II. Total marks scored by Abhijit in Maths, Science and English are 198.

III. Marks scored by Abhijit in Science are more than his marks in English by 12.

A) Any two of the three B) Only II and III
C) All I, II and III D) Question cannot be answered even with the information in all the three statements
 
Answer & Explanation Answer: C) All I, II and III

Explanation:

Suppose marked scored by Abhijit in English = x
From statement I,
Marks in science = x + 12
From statement III,
Marks in mathematics = x + 12 + 20
= x + 32
From statement II,
English + Science + Mathematics = 198
x + x +12 + x + 38 = 198
3x = 154
x = 154/3
All I, II and III are required to find answer.

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