Quantitative Aptitude - Arithmetic Ability Questions

Q:

In following number series only one number is wrong. Find out that wrong or odd number in the series?

6, 78, 858, 7722, 54055, 270270

A) 270270 B) 54055
C) 7722 D) 858
 
Answer & Explanation Answer: B) 54055

Explanation:

Here the given series follows a pattern that, multiplying the number with odd numbers in decreasing order starting with 13. That is,

 

6 × 13 = 78

 

65 × 11 = 858

 

858 × 9 = 7722

 

7722 × 7 = 54054

 

54054 × 5 = 270270

 

Hence, the wrong number is 54055

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8 55061
Q:

Which of the following statement(s) is/are TRUE?

 

I. √(64) + √(0.0064) + √(0.81) + √(0.0081) = 9.07
II. √(0.010201) + √(98.01) + √(0.25) = 11.51

A) Only I B) Only II
C) Both I and II D) Neither I nor II
 
Answer & Explanation Answer: A) Only I

Explanation:
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0 54982
Q:

1, 2, 8, 33, ?

Find the next number in the given series?

A) 148 B) 145
C) 143 D) 141
 
Answer & Explanation Answer: A) 148

Explanation:

1 x 1 + 1 x 1 = (1 + 1) = 2

2 x 2 + 2 x 2 = (4 + 4) = 8

8 x 3 + 3 x 3 = (24 + 9) = 33

33 x 4 + 4 x 4 = (132 + 16) = 148

148 x 5 + 5 x 5 = (740 + 25) = 765.

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10 54978
Q:

Find the next number in the sequence?

28, 16, 28, 76, 274

A) 1233 B) 1243
C) 1256 D) 1276
 
Answer & Explanation Answer: B) 1243

Explanation:

Given number sequence is 28, 16, 28, 76, 274

Here the sequence follows a pattern that

28

28 x 0.5 + 2 = 14 + 2 = 16

16 x 1.5 + 4 = 24 + 4 = 28

28 x 2.5 + 6 = 70 + 6 = 76

76 x 3.5 + 8 = 266 + 8 = 274

274 x 4.5 + 10 = 1233 + 10 = 1243

 

Hence, the next number in the given number sequence is 1243.

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1 54954
Q:

The length and breadth of a rectangle are 15 cm and 8 cm respectively. Calculate its perimeter (in cm).

 

A)  46 B) 92
C)  35 D)  70
 
Answer & Explanation Answer: A)  46

Explanation:
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0 54795
Q:

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

 

A) Car – Road B) Water – Ship
C) Track – Train D) Sky – Aeroplane
 
Answer & Explanation Answer: A) Car – Road

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0 54649
Q:

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

 

A) Vehicle – Car B) Scooter – Vehicle
C) Truck – Vehicle D) Bus – Vehicle
 
Answer & Explanation Answer: A) Vehicle – Car

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Q:

ΔPQR is right angled at Q. If m∠R=300, then find the value of (cosP - 1/3).

 

A) 1/6 B)  (2√2-1)/√2
C)  -1/√3 D)  (√3-4)/2√3
 
Answer & Explanation Answer: A) 1/6

Explanation:
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