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 Quantitative Aptitude - Arithmetic Ability Questions

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Q:

Given w = -2, x = 3, y = 0 & z = -1/2. Find the value of 2(w2 + x2 + y2).

 

A) 26 B) -26
C) 25 D) 28
 
Answer & Explanation Answer: A) 26

Explanation:
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Q:

What is the square root of (√5 + 2)/(√5 – 2)?

 

A) √5 – √4   B) √5 + 2  
C) 5 + √2   D) 7
 
Answer & Explanation Answer: B) √5 + 2  

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Q:

On 8th Dec, 2007 Saturday falls. What day of the week was it on 8th Dec, 2006?

A) Saturday B) Friday
C) Monday D) Tuesday
 
Answer & Explanation Answer: B) Friday

Explanation:

The year 2006 is an ordinary year. So, it has 1 odd day.

So, the day on 8th Dec, 2007 will be 1 day beyond the day on 8th Dec, 2006.

But, 8th Dec, 2007 is Saturday

S0, 8th Dec, 2006 is Friday.

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Filed Under: Calendar

183 43802
Q:

In a class, there are 15 boys and 10 girls. Three students are selected at random. The probability that 1 girl and 2 boys are selected, is:

A) 21/46 B) 1/5
C) 3/25 D) 1/50
 
Answer & Explanation Answer: A) 21/46

Explanation:

Let , S -  sample space        E - event of selecting 1 girl and 2 boys. 

Then, n(S) = Number ways of selecting 3 students out of 25 

                = 25C3 

                = 2300.

n(E) = 10C1×15C2 = 1050. 

P(E) = n(E)/n(s) = 1050/2300 = 21/46

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Filed Under: Probability

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Q:

Compute of 1848 / 231 - 10 = ?

 

A) 2 B) -2
C) 188/221 D) 1884/221
 
Answer & Explanation Answer: B) -2

Explanation:
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Q:

Solve the following.

 

-4 - (-7 - 12 / 4) = ?

A) -2 B) 6
C) 0.75 D) -14
 
Answer & Explanation Answer: B) 6

Explanation:
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Q:

45 + 47 = ?

 

A) 8/12 B) 48/35
C) 8/35 D) 16/35
 
Answer & Explanation Answer: B) 48/35

Explanation:
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Q:

Find the missing number in the given number series?

2676, 445, ?, 21,6, 2, 1

A) 88 B) 92
C) 96 D) 102
 
Answer & Explanation Answer: A) 88

Explanation:

The given number series 2676, 445, ?, 21,6, 2, 1 follows a pattern that,

From right side,

1

1 x 1 + 1 = 2

2 x 2 + 2 = 6

6 x 3 + 3 = 21

21 x 4 + 4 = 88

88 x 5 + 5 = 445

445 x 6 + 6 = 2676

 

Hence the missing number in the given number series is 88.

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Filed Under: Odd Man Out
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