# Recent questions tagged sequences&series

41

In the following question, one term in the number series is wrong. Find out the wrong term.$125, 126, 124, 127, 123, 129$$123$$124$$126$$129$

42

In the following question, find out the correct answer from the given alternatives.If $\text{TABLE}$ is coded as $\text{GZYOV}$, how is $\text{JUICE}$ coded?$\text{OZLFJ}...

43

In the following question, find out the correct answer from the given alternatives.If in a certain language $\text{MECHANICS}$ is coded as $\text{HCEMASCIN}$, how is $\te...

44

In the following question, a series is given with one term missing. Choose the correct alternative that will continue the same pattern and fill in the blank space.$50,49,...

45

In the following question, a series is given with one term missing. Choose the correct alternative that will continue the same pattern and fill in the blank space.$71,76,...

46

In the following question, a series is given with one term missing. Choose the correct alternative that will continue the same pattern and fill in the blank space.$6, 25$...

47

In the following question, three out of four alternatives contain alphabet placed in a particular form. Find the one that does not belong to the group.$JMP$$RUX$$UYB$$EHK...

48

In the following question, three out of four alternatives contain alphabet placed in a particular form. Find the one that does not belong to the group.$CBAZ$$AZYX$$AZBY$$...

49

In the following question, three out of four alternatives contain alphabet placed in a particular form. Find the one that does not belong to the group.$LNMO$$CRDT$$EUFV$$...

50

In the following question, three out of four alternatives contain alphabet placed in a particular form. Find the one that does not belong to the group.$BCDEI$$PQRSW$$LMNO...

51

Find out the wrong term from the following series and select the number from the alternatives which will replace the wrong term in the series.$2,9,28,65,126,216,344:$$38$...

52

Find out the wrong term from the following series and select the number from the alternatives which will replace the wrong term in the series.$299, 178, 97, 48, 24, 14, 1...

53

Find the odd one in the following series:$2, 5, 10, 17, 26, 37, 50, 64$$50$$26$$37$$64$

54

Complete the missing element of the following series:$1$$2$$3$$4$

55

FAG, GAF, HAI, IAH, _____JAKHALHAKJAI

56

JAK, KBL, LCM, MDN, _____OEPNEOMENPFQ

57

Which number pair comes next in the series?$4\:7\:26\:10\:13\:20\:16$$14\:4$$14\:17$$18\:14$$19\:14$

58

QAR, RAS, SAT, TAU, _____UAVUATTASTAT

59

Let $a_{1},a_{2}\dots$ be integers such that $a_{1}-a_{2}+a_{3}-a_{4}+\dots+(-1)^{n-1}a_{n}=n$, for all $n\geq 1$ Then $a_{51}+a_{52}+\dots+a_{1023}$ equals$-1$$10$$0$$1$...

60

If $a_1=1$ and $a_{n+1}-3a_n+2=4n$ for every positive integer $n$, then $a_{100}$ equals$3^{99}-200$$3^{99}+200$$3^{100}-200$$3^{100}+200$

61

Let $\text{S}_n$ denote the sum of the squares of the first $n$ odd natural numbers. If $\text{S}_n=533n,$ find the value of $n$.$18$$20$$24$$30$

62

If $a_{1}+a_{2}+a_{3}+\dots+a_{n}=3(2^{n+1}-2)$, for every $n\geq 1$, then $a_{11}$ equals ______

63

Consider a sequence $\text{S}$ whose $n$th term $T_{n}$ is defined as $1+\frac{3}{n}$, where $n=1,2, \dots$. Find the product of all the consecutive terms of $\text{S}$ s...

64

The fourth term of an arithmetic progression is 8. What is the sum of the first 7 terms of the arithmetic progression?76456cannot be determined

65

$22^{22} * 33^{33} * 44^{44} * 55^{55}$3210

66

25, 100, ?, 1600, 6400A. 400B. 300C. 360D. 420E. None of these

67

18, 22, 30, ? ,78, 142A. 44B. 35C. 46D. 48E. None of these

68

6, 12, 21, ? , 48A. 33B. 39C. 36D. 31E. None of these

69

11, 14, 19, 22, 27, 30, ?A. 39B. 34C. 36D. 35E. None of these

70

0, 6, 24, 60, 120, 210, ?A. 336 B. 349C. 312D. 337E. None of these

75

C, G, K, 0, S, ? one term is missing.Select one alternative A.WB.XC.YD.U

76

1, 9, 25, 49, ?, 121. What will come at the place of question mark ?A.100B. 91C. 64D.81

77

What are some easy ways to understand and approach number series

79

Look at this series: VI, 10, V, 11, __, 12, III, ... What number should fill the blank?

80

Look at this series: F2, __, D8, C16, B32, ... What number should fill the blank?