Bankers Adda_ All About Number Series
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Transcript of Bankers Adda_ All About Number Series
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AllAboutNumberSeriesWhatisNumberSeries?
Numberseries isaarrangementofnumbers inacertainorder,wheresomenumbers are wrongly put into the series of numbers and some number ismissing in thatseries,weneed toobserveand find theaccuratenumber totheseriesofnumbers.
In competitive exams number series are given andwhere you need to findmissingnumbers.Thenumberseriesarecomeindifferenttypes.Atfirstyouhavetodecidedwhat typeofseriesaregiven inpapersthenaccordingwiththisyouhavetouseshortcuttricksasfastasyoucan.
DifferenttypesofNumberSeries
TherearesomeformatofserieswhicharegiveninExams.
PerfectSquareSeries:
This Types of Series are based on square of a number which is in sameorderandonesquarenumberismissinginthatgivenseries.
Example1:441,484,529,576?
Answer:441=212,484=222,529=232,576=242,625=252.
PerfectCubeSeries:
ThisTypesofSeriesarebasedoncubeofanumberwhichisinsameorderandonecubenumberismissinginthatgivenseries
Example2:1331,1728,2197,?
Answer:113,123,133,143
GeometricSeries:
This typeofseriesarebasedonascendingordescendingorderofnumbersandeachsuccessivenumberisobtainbymultiplyingordividingthepreviousnumberwithafixednumber.
Example3:5,45,405,3645,?
Answer:5x9=45,45x9=405,405x9=3645,3645x9=32805.
TwostageTypeSeries:
A two tier Arithmetic series is one in which the differences of successivenumbersthemselvesformanarithmeticseries.
Example4:i.3,9,18,35,58,
ii.6,9,17,23,
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MixedSeries:
This type of series aremore than one different order are given in a serieswhicharrangedinalternatively inasingleseriesorcreatedaccordingtoanynonconventional rule. This mixed series Examples are describes inseparately.
Examples5:
11,24,50,102,206,?
Answer:
11x2=22+2=24,
24x2=48+2=50,
50x2=100+2=102,
102x2=204+2=206,
206x2=412+2=414.Sothemissingnumberis414.
NumberSeriesQuiz
Directions(110):Whatwill come inplaceof thequestionmarks (?) in thefollowingNumberseries?1.0,6,24,60,120,210,?
A.336B.349C.312D.337E.Noneofthese
2.11,14,19,22,27,30,?A.39B.34C.36D.35E.Noneofthese
3.6,12,21,?,48A.33B.39C.36D.31E.Noneofthese
4.18,22,30,?,78,142A.44B.35
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C.46D.48E.Noneofthese
5.73205,6655,605,55,?A.9B.5C.13D.11E.Noneofthese
6.25,100,?,1600,6400A.400B.300C.360D.420E.Noneofthese
7.125,?,343,512,729,1000A.216B.215C.256D.225E.Noneofthese
8.1,9,125,343,?,1331A.730B.729C.512D.772E.Noneofthese
9.121,144,169,?,225A.180B.172C.186D.196E.Noneofthese
10.?,2116,2209,2304,2401,2500A.2124B.1972C.1521D.2025E.Noneofthese
AnswerswithExplanation:
1.(A)Thegivenseriesis:131,232,333,434,535,636,
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Sothemissingterm=737=3437=336.
2.(D)Thepatternis+3,+5,+3,+5,Sothemissingtermis=30+5=35.
3.(A)Thepatternis+6,+9,+12,+15..Sothemissingtermis=21+12=33.
4.(C)Thepatternis+4,+8,+16,+32,+64Sothemissingtermis=30+16=46.
5.(B)5x11=55,55x11=605,605x11=6655,6655x11=73205
6.(A)25x4=100,100x4=400,400x4=1600,1600x4=6400.
7.(A)125=53,216=63,343=73,512=83,729=93,1000=103.
8.(B)13,33,53,73,93,113
9.(D)121=112,144=122,169=132,196=142,225=152.
10.(D)2025=452,2116=462,2304=482,2401=492,2500=502
TIMETAKEN
Within5min:EXCELLENT58min:YOUCANDOBETTERMorethan8min:YOUNEEDTOWORKHARD