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CBSE Questions for Class 11 Engineering Maths Sequences And Series Quiz 5 - MCQExams.com

The value of 10n=1(sin2nπ11cos2nπ11) is equal to
  • 2
  • 1
  • 0
  • 1
For 22+42+62+...+(2n)212+32+52+...+(2n1)2 to exceed 1.01, the maximum value of n is
  • 99
  • 100
  • 101
  • 150
The sum of the first n terms of the series 12+2.22+33+2.42+52+2.62+.... is n(n+1)22 when n is even. When n is odd the sum is
  • n(n+1)24
  • n2(n+2)4
  • n2(n+1)4
  • n(n+2)24
The infinite sum 1+47+972+1673+2574+...... equals
  • 2714
  • 2113
  • 4927
  • 256147
If xi>0,i=1,2,....,50andx1+x2+...+x50=50 then the minimum value of 1x1+1x2+...+1x50 equals to
  • 50
  • (50)2
  • (50)3
  • (50)4
If nr=1tr=112n(n+1)(n+2), then the value of nr=11tr is
  • 2nn+1
  • n(n+1)
  • 4nn+1
  • 3nn+1
The value of 1123+1234+1345+1456 is equal to
  • 730
  • 1130
  • 1330
  • 1730
Value of 9+99+999+.... upto n terms is
  • 10n9n109
  • 10n9n1081
  • 10n+19n1081
  • 10n+19n109
In the following question, the numbers/letters are arranged based on some pattern or principle. Choose the correct answer for the term marked by the symbol (?) 
0,3,9,18,30,?
  • 48
  • 42
  • 36
  • 45
Evaluate 7+77+777+............. upto n terms.
  • 781[10n+19n]
  • 781[10n+19n10]
  • 781[10n9n10]
  • 781[10n+1n10]
4, 9, 25, 49, ....
  • 64
  • 81
  • 121
  • 125
Find a wrong number in the series:
9, 19, 37, 75, 149, 297
  • 75
  • 37
  • 19
  • 149
  • 299
Find pair of consecutive odd natural numbers, both of which are larger than 13 such that their sum is less than 40
  • (15, 17)
  • (13, 17)
  • (19, 21)
  • (21, 17)
In  the following question, the numbers/letters are arranged based on some pattern or principle.Choose the correct answer for the term marked by the symbol (?) 
325102_22cb04bab72c40da93cf75ddfe9760a1.png
  • 18
  • 40
  • 21
  • 24
The sum of 'n' terms of series 12+(12+22)+(12+22+32)+(12+22+32+42)+....... will be
  • 14n(n+1)2(n+2)
  • 13n(n+1)2(n+2)
  • 112n(n+1)(n+2)2
  • 112n(n+1)2(n+2)
11,26,56,101,161,.....
  • 236
  • 226
  • 216
  • 206
3, 15, 35, 63, 99, ...
  • 133
  • 143
  • 153
  • 165
10, 12, 16, 24, 40, ....
  • 60
  • 56
  • 70
  • 72
Find the Odd one among : 97, 77, 59, 43, 26, 17
  • 77
  • 59
  • 43
  • 26
- nmmn - mmnm - mnnm -
  • nmmn
  • mnnm
  • nnmm
  • nmnm
7th term of 121416 is
  • 110
  • 112
  • 114
  • 116
Find the missing letters
A, B, D, G, .....
  • L
  • M
  • J
  • K
Find the Odd one among : 49, 121, 169, 225, 289, 361
  • 225
  • 121
  • 49
  • 361
In a series, Tn=2n+5, find S4.
  • 40
  • 30
  • 20
  • 10
1321+1521+1721+......+13521=
  • 417
  • 1772
  • 1972
  • 1736
There is no symmetry in symmetry in legs of Fig
The value of 12+22+32++n2 is
  • n(n+1)2
  • n(n+1)(2n+1)6
  • n(n+1)(2n1)6
  • [n(n+1)2]2
The product (11n)(11n+1)(11n+2)..(112n)  Equals
  • n12n
  • 12n
  • 2nn1
  • 1n
Find the sum of first three terms of the following sequence whose nth term is 5n22.
  • 68
  • 86
  • 69
  • 82
In a certain language '+÷?' means 'where are you' , '@÷' means ' we are here' , and '+@×' means ' you come here' What is the code for ' Where' ?
  • +
  • ÷
  • ?
  • @
How is 'red written in that code ?
  • hee
  • silk
  • be
  • cannot be determined
Image
414387.JPG
  • 70
  • 75
  • 65
  • 80
How is 'vegetables are red flowers' written in this code ?
  • Pec silk mit hee
  • silk peehee be
  • il silk mit hee
  • none
Find the sum of odd numbers between 2 and 76.
  • 1,350
  • 1,443
  • 1,342
  • 1,360
Find the next number of the series.
7,10,8,11,9,12,....
  • 9
  • 10
  • 8
  • 7
In a certain sequence of 8 numbers, each number after the first is 1 more than the previous number .If the first number is -5, how many of the numbers in the sequence are positive? 
  • None
  • One
  • Two
  • Three
  • Four
Find the value of ? in the series: 12,17,15,?,18,23,21,....
  • 20
  • 21
  • 22
  • 24
Find the value of x in the series: 144,169,x,225,256,289.
  • 190
  • 192
  • 196
  • 195
Find the missing number in the pattern: 2,5,8,11, __,17,20,23,26
  • 11
  • 12
  • 13
  • 14
Complete the pattern: 3,5,8,13, ___ 
  • 21
  • 22
  • 23
  • 24
Which pair of numbers comes next?
25,23,5,20,16,5,....
  • 11,5
  • 5,6
  • 10,5
  • 9,5
Which number comes next?
5,9,13,17,21,25,29,...
  • 31
  • 32
  • 30
  • 33
2,3, __,4,4,5,6,6,6,7,7,7... What number should fill the blank?
  • 1
  • 2
  • 3
  • 4
Which pair of numbers comes next?
10,18,12,21,15,25,,....
  • 19,30
  • 19,27
  • 30,19
  • 27,19
Fill in the blank: 62,66,63,66,64, __,65,....
  • 60
  • 61
  • 62
  • 63
Look at this series: 32,31,33,32,34,33,.... What is the next number?
  • 34
  • 32
  • 35
  • 36
Choose the missing number in the series: 2,2,3,4,4,__,6,6,7,8,8,9....
  • 5
  • 6
  • 7
  • 8
The value of tanα+2tan(2α)+4tan(4α)+...+2n1tan(2n1α)+2ncot(2nα) is
  • cot(2nα)
  • 2ntan(2nα)
  • 0
  • cotα
What is the missing number in the sequence 1,5,10,16,23,31, ____?
  • 37
  • 38
  • 39
  • 40
  • 41
The sum of 24 terms of the following series 2+4+6.....
  • 100
  • 200 
  • 600 
  • 250 
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