model 2 average of consecutive numbers Practice Questions Answers Test with Solutions & More Shortcuts
average PRACTICE TEST [9 - EXERCISES]
model 1 basic average questions
model 2 average of consecutive numbers
model 3 twice, thrice, one third etc. of numbers
model 4 find nth average from 1st & last number
model 5 find new average from error
model 6 find average of excluded number
model 7 average on ages/weight
model 8 find monthly income
model 9 average on cricket/exam
Question : 1 [SSC CHSL 2012]
Average of first five odd multiples of 3 is
a) 21
b) 15
c) 16
d) 12
Answer »Answer: (b)
Using Rule 1,
Average of numbers = ${x_1+x_2+…+x_n}/n$
Average of first five odd multiples of 3
= ${3(1+3+5+7+9)}/5$
= ${3×25}/5$ = 15
Question : 2 [SSC CHSL 2012]
The average of four consecutive even numbers is 15. The 2nd highest number is
a) 16
b) 14
c) 18
d) 12
Answer »Answer: (a)
x + x + 2 + x + 4 + x + 6 = 15 × 4
⇒ 4x + 12 = 60
⇒ 4x = 60 – 12 = 48
⇒ x = $48/4$ = 12
Hence, the numbers are 12, 14, 16, 18
∴ The second highest number is 16.
Question : 3 [SSC CGL Tier-I 2010]
The average of the first 100 positive integers is
a) 49.5
b) 50.5
c) 51
d) 100
Answer »Answer: (b)
Using Rule 3,
Average of 1,2,3, .....n =${n +1}/2$
Formula,
1 + 2 + 3 + ...... + n= ${n(n+1)}/2$
Average of these numbers = ${n+1}/2$
∴ Required average
${100+1}/2$ = 50.5
Question : 4 [SSC Data Entry Operator 2008]
The average of nine consecutive odd numbers is 53. The least odd number is
a) 45
b) 35
c) 27
d) 22
Answer »Answer: (a)
x + x + 2 + x + 4 + x + 6 + x +
8 + x + 10 + x + 12 + x + 14 + x + 16 = 9 × 53
⇒ 9x + 72 = 477
⇒ 9x = 477 – 72 = 405
⇒ x = $405/9$ = 45
Question : 5 [SSC CHSL 2012]
The average of four consecutive even numbers is 9. Find the largest number.
a) 10
b) 8
c) 6
d) 12
Answer »Answer: (d)
x + x + 2 + x + 4 + x + 6 = 9 × 4
⇒ 4x + 12 = 36
⇒ 4x = 36 – 12 = 24
∴ x = $24/4$ = 6
∴ Largest number = 6 + 6 = 12
IMPORTANT quantitative aptitude EXERCISES
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Basic Average Questions Practice Test, Shortcuts, Tricks, PDF »
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New Average Aptitude MCQ Average of Consecutive Numbers »
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Top 99+ Average Aptitude: Twice, One Third of Numbers MCQ »
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New +99 Average Aptitude MCQ Find nth Average of Numbers »
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99+ Average Aptitude Find New Average from Error MCQ Test »
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Top 99+ Aptitude MCQ Test on Average With Excluded Number »
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Top 99+ Aptitude Average on Ages & Weights MCQ Test Quiz »
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Top Aptitude Average MCQ Find Monthly Income for Average »
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Top 149+ Aptitude Average on Cricket & Exam MCQ Test Quiz »
model 2 average of consecutive numbers Shortcuts »
Click to Read...model 2 average of consecutive numbers Online Quiz
Click to Start..average Shortcuts and Techniques with Examples
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model 1 basic average questions
Defination & Shortcuts … -
model 2 average of consecutive numbers
Defination & Shortcuts … -
model 3 twice, thrice, one third etc. of numbers
Defination & Shortcuts … -
model 4 find nth average from 1st & last number
Defination & Shortcuts … -
model 5 find new average from error
Defination & Shortcuts … -
model 6 find average of excluded number
Defination & Shortcuts … -
model 7 average on ages/weight
Defination & Shortcuts … -
model 8 find monthly income
Defination & Shortcuts … -
model 9 average on cricket/exam
Defination & Shortcuts …
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