6, 11, 8, 9, 11, 7, ?, 5
Number Series Logic: Finding the Missing Term
The question asks to find the missing number in the given number series: 6, 11, 8, 9, 11, 7, ?, 5.
To solve this number series completion problem, we need to identify the underlying pattern. Often, these series involve interleaved sequences or alternating operations.
Analyzing the Series Pattern
Let's examine the series by splitting it into two separate sequences based on the position of the numbers:
- Sequence 1 (Odd positions): 6, 8, 11, ?
- Sequence 2 (Even positions): 11, 9, 7, 5
Sequence 1 Analysis
Consider the numbers at odd positions: 6, 8, 11.
- The difference between the first two terms is $8 - 6 = 2$.
- The difference between the second and third terms is $11 - 8 = 3$.
The differences are increasing by 1 ($+2$, $+3$). Following this pattern, the next difference should be $+4$.
Therefore, the missing number (the fourth term in this sequence) is $11 + 4 = 15$.
Sequence 2 Analysis
Consider the numbers at even positions: 11, 9, 7, 5.
- The difference between consecutive terms is constant: $9 - 11 = -2$, $7 - 9 = -2$, $5 - 7 = -2$.
This sequence is an arithmetic progression with a common difference of -2.
Determining the Missing Number
The question mark (?) is at the 7th position, which corresponds to the 4th term of Sequence 1 (the odd positions sequence).
Based on the analysis of Sequence 1, the missing number is calculated as $11 + 4 = 15$.
The complete series is 6, 11, 8, 9, 11, 7, 15, 5.
Similar Questions
- Refer to the following number and symbol series and answer the question that follows. Counting to be done from left to right only.
(Left) $ \ % % # > ? > ^ # 6 5 > > 4 9 \ 6 ^ \ / (Right)
How many such numbers are there that are immediately preceded by a symbol and also immediately followed by a symbol? - Refer to the following number and symbol series and answer the question that follows. All numbers are single-digit. Counting to be done from left to right only.
(Left) 7 1 * £ 5 9 # @ 8 $ & + 3 2 4 6 % Ω (Right)
How many such numbers are there each of which is immediately preceded by a symbol and also immediately followed by another number? - Refer to the following letter and symbol series and answer the question that follows. Counting to be done from left to right only. (Note: All numbers are single digit numbers only).
(Left) % 6 2 9 4 7 + $ 1 $\Omega$ # * £ 3 & 8 5 @ (Right)
How many such numbers are there each of which is immediately preceded by another number and also immediately followed by a symbol? - Refer to the following number and symbol series and answer the question that follows. Counting to be done from left to right only.
(Left) 9 & 2 * 4 @ 5 £ 8 # 6 & 1 $\Omega$ 7 % $ 3 (Right)
How many such symbols are there, each of which is immediately preceded by an odd number but NOT immediately followed by an even number? - Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?
BGS 153, XLO 142, TQK 131, PVG 120, LAC 109, ? - Select the term from among the given options that can replace the question mark (?) in the following series.
A11, D8, G5, ? - From the given options, select the option that can replace the question mark (?) in the following series.
26A2, 4E6, 8I10, 14O16, ? - Select the combination of letters that when sequentially placed in the blanks will create a repetitive pattern.
_baa_aa_aab_ - Select the combination of letters that when sequentially placed in the blanks will create a repetitive pattern.
_stu_vuts_rst_vvu_sr - Select the alphanumeric-cluster that can replace the question mark (?) in the following series.
5A, 7C, 6E, 8G, ?, 9K, 8M
Important Questions from Mixed Series
Select the set of letters that when sequentially placed in the blanks of the given letter series will complete the series.
P_rsqrps_pqs_qr_qrps_p_sA series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
GAR, AXS, UUT, ORU, ?
Select the option that represents the letters that, when sequentially placed from left to right in the blanks below, will complete the letter series.
PRKY_LDP_ _YOLD_RKYO_DPRK_ _LD
Select the option that represents the letters that, when sequentially placed from left to right in the blanks below, will complete the letter series.
C _ _ SRCNP _ _ _ N _ SRC _ PS _
Select the option that represents the letters that, when placed from left to right in the blanks, will complete the letter series.
_B_T F H B N_F I_N T F_B N T F
