Quantitative Aptitude - Arithmetic Ability Questions

Q:

30 women do half of the total work in 30 days. How many more women will be required to complete the remaining work in 10 days?

A) 45 B) 30
C) 60 D) 80
 
Answer & Explanation Answer: C) 60

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Filed Under: Time and Work
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Q:

If the product of two numbers is 3026 and their LCM is 89, then their HCF is :

A) 33 B) 34
C) 35 D) 29
 
Answer & Explanation Answer: B) 34

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Filed Under: HCF and LCM
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Q:

The standard deviation of the set {10, 11, 9, 11, 9} is

A) 1/√5 B) 2/√5
C) 3/√5 D) 0
 
Answer & Explanation Answer: B) 2/√5

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Filed Under: Simplification
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Q:

If 3x= 4y= 12, then z is equal to

A) xy B) x + y
C) xy/x+Y D) 4x +3y
 
Answer & Explanation Answer: C) xy/x+Y

Explanation:
Taking log of all 3 we get
xln3 = yln4 =
zln12 = k
z = k/ln12 = k / ln(
3*4) = k/ln3 + ln4 = k / (k/x +k/y) = xy / (x+y)
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Q:

If 70% of total articles are sold at a profit of 20% and remaining articles are sold at a loss of 20%, then what will be the overall profit percentage?

A) 8 B) 12
C) 16 D) 6
 
Answer & Explanation Answer: A) 8

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Filed Under: Profit and Loss
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Q:

In the given figure, PQR is a quadrant whose radius is 7 cm. A circle is inscribed in the quadrant as shown in the figure. What is the area (in sq.cm) of the circle?

 

A) 385 – 221√2 B) 308 – 154√2
C) 154 – 77√2 D) 462 – 308√2
 
Answer & Explanation Answer: D) 462 – 308√2

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Filed Under: Area
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Q:

9997 x 10003 = ?

A) 9999991 B) 99999911
C) 99999991 D) 9999911
 
Answer & Explanation Answer: A) 9999991

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Filed Under: Simplification
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Q:

A, B and C can complete the work in 4, 5 and 6 hours respectively. If they all work together and receive Rs. 777 as wages then find the share of A.

A) Rs. 300 B) Rs. 315
C) Rs. 326 D) Rs. 175
 
Answer & Explanation Answer: B) Rs. 315

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