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 Quantitative Aptitude - Arithmetic Ability Questions

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Q:

Select the number pair that does not belong in the following group.

 

(1,1), (4,64), (8,512), (9,719)

 

A) (1,1) B) (8,512)
C) (9,719) D) (4,64)
 
Answer & Explanation Answer: C) (9,719)

Explanation:
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Filed Under: Odd Man Out
Exam Prep: Bank Exams

0 51458
Q:

Mark the odd man out of the series?

1 6 27 124 650

A) 27 B) 124
C) 6 D) 650
 
Answer & Explanation Answer: D) 650

Explanation:

The given series is 1 6 27 124 650

1

1 + 2 x 2 = 6

6 + 3 x 3 = 27

27 + 4 x 4 = 124

124 + 5 x 5 = 645 (NOT 650)

 

 

Hence, the odd man in the given number series is 650.

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Filed Under: Odd Man Out
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Analyst , Bank Clerk , Bank PO

11 51320
Q:

If a = 5 + 22 & b = 5 - 22, then find the value of a2 - b2.

 

A) 2 B) 4
C) 2√2 D) 4√2
 
Answer & Explanation Answer: D) 4√2

Explanation:
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Filed Under: Simplification
Exam Prep: Bank Exams

0 51235
Q:

Find the odd man out of the series given

8, 16, 20, 36, 68

A) 68 B) 36
C) 20 D) 16
 
Answer & Explanation Answer: D) 16

Explanation:

The given number series is 8, 16, 20, 36, 68

8

8 x 2 - 4 = 12 (NOT 16)

12 x 2 - 4 = 20

20 x 2 - 4 = 36

36 x 2 - 4 = 68

 

Hence, the odd man in the given series is 16.

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Filed Under: Odd Man Out
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Analyst , Bank Clerk , Bank PO

16 51225
Q:

In how many different ways can the letters of the word 'OPTICAL' be arranged so that the vowels always come together?

A) 360 B) 700
C) 720 D) 120
 
Answer & Explanation Answer: C) 720

Explanation:

The word 'OPTICAL' contains 7 different letters.

When the vowels OIA are always together, they can be supposed to form one letter.

Then, we have to arrange the letters PTCL (OIA).

Now, 5 letters can be arranged in 5! = 120 ways.

The vowels (OIA) can be arranged among themselves in 3! = 6 ways.

Required number of ways = (120 x 6) = 720.

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Filed Under: Permutations and Combinations

51 51205
Q:

What should come in place of question mark (?) in the following question?

12.5 × 3.2 × 8.8 = ?

A) 358 B) 355
C) 354 D) 356
 
Answer & Explanation Answer:

Explanation:

12.5 × 3.2 × 8.8 = 352

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Filed Under: Simplification

0 51157
Q:

Read the data given below and answer the questions based on it.

 

In the CBSE Board exams last year, 53% passed in Biology, 61% percent passed in English, 60% in Social studies, 24% in Biology and English, 35% in English and social studies, 27% in Biology and social studies and 5% in none.

 

What is the ratio of percentage of students who passed in Biology and Social Studies but not English in relation to the percentage of students who passed in Social Studies and English but not Biology?

A) 5:7 B) 7:5
C) 4:5 D) 5:4
 
Answer & Explanation Answer: A) 5:7

Explanation:
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Filed Under: Percentage
Exam Prep: Bank Exams

2 51140
Q:

A number is decreased by 10% and then increased by 10%.  The number so obtained is 10 less than the original number. What was the oiginal number ? 

A) 1000 B) 2000
C) 3000 D) 4000
 
Answer & Explanation Answer: A) 1000

Explanation:

Let the original number be x.

 

Final number obtained = 110% of (90% of x) =(110/100 * 90/100 * x) = (99/100)x. 

 

x-(99/100)x=10

=> x =1000

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Filed Under: Percentage

141 51129