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Q:

A student multiplied a number by 4/5 instead of 5/4. What is the percentage error in the calculation?

A) 56.25 percent B) 18 percent
C) 28.13 percent D) 36 percent
 
Answer & Explanation Answer: D) 36 percent

Explanation:
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Filed Under: Percentage
Exam Prep: AIEEE , Bank Exams , CAT

Q:

Direction: What should come in the place of question mark (?) in the following number series? 24, 25, ?, 41, -8, 73

A) 13 B) 16
C) 25 D) 43
 
Answer & Explanation Answer: B) 16

Explanation:

The pattern followed is 

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Filed Under: Numbers
Exam Prep: AIEEE , Bank Exams , GATE

Q:

Direction: What should come in the place of question mark (?) in the following number series?

7, 10, 16, 28, ?, 100

A) 34 B) 40
C) 52 D) 60
 
Answer & Explanation Answer: C) 52

Explanation:

The pattern followed is +3 , +6 , +12 , +24 , +48

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Exam Prep: AIEEE , Bank Exams , GATE

Q:

Direction: What should come in the place of question mark (?) in the following number series?

3, 4, 10, 33, 136, ?

A) 150 B) 298
C) 463 D) 572
 
Answer & Explanation Answer:

Explanation:

The pattern followed is *1 + 1, *2 +2 , *3 + 3 , *4 + 4 , *5 + 5

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Exam Prep: AIEEE , Bank Exams , GATE

Q:

Direction: What should come in the place of question mark (?) in the following number series?

2, 3, 6, 15, 45, ?

A) 90 B) 135
C) 157.5 D) 200
 
Answer & Explanation Answer: C) 157.5

Explanation:

The pattern followed is *1.5 , * 2 , *2.5 , *3 , *3.5

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Exam Prep: AIEEE , Bank Exams , GATE

Q:

x and y are two numbers such that their mean proportion is 16 and third proportion is 128. What is the value of x and y?

A) 8 and 16 B) 16 and 32
C) 8 and 32 D) 16 and 16
 
Answer & Explanation Answer: C) 8 and 32

Explanation:
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Filed Under: Ratios and Proportions
Exam Prep: AIEEE , Bank Exams , CAT

Q:

What was the total number of books sold in Shop Q in 2003, 2004, and 2005?

A) 36500 B) 38500
C) 37500 D) 39000
 
Answer & Explanation Answer: C) 37500

Explanation:

Required total number of sales = 14.4 + 7.4 + 15.7 = 37.5
Thousand = 37500.

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Filed Under: Quantitative Aptitude - Data Interpretation
Exam Prep: GATE , Bank Exams , AIEEE

Q:

Of three positive numbers, the ratio of the first and second numbers is 3:4 & that of the second and third numbers is 5:6. The product of the second and third numbers is 4320. What is the sum of three numbers?

A) 167 B) 177
C) 187 D) 197
 
Answer & Explanation Answer: B) 177

Explanation:

Let the second & third numbers are 2x & 3x respectively.
ATQ,
5x*6x = 4320
30*x*x = 4320
x*x = 144
x=12
Hence, second number = 5x = 5*12 = 60
Third number = 6x = 6*12 = 72
Ratio of first & second number = ¾
Hence, first number = ( ¾)*60 = 45
Sum of these 3 numbers = 60+72+45 = 177

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Filed Under: Ratios and Proportions
Exam Prep: Bank Exams