Refer to the following letter, number and symbol series and answer the question that follows. Counting to be done from left to right only. (All numbers are single-digit numbers only.)
(Left) N R B C & 1 J 5 ! $ 7 S K 9 3 # (Right)
How many such numbers are there which are immediately preceded by a symbol and also immediately followed by a letter?
Analyzing the Number Series Logic
This question challenges us to carefully examine a given series of letters, numbers, and symbols to find specific patterns. We need to count how many numbers fit a precise condition: being immediately preceded by a symbol and also immediately followed by a letter. Let's break down the series and the rule.
The Series and the Rule
The series provided is:
$N R B C & 1 J 5 ! $ 7 S K 9 3 #$
We are looking for numbers that follow the pattern: Symbol Number Letter. Counting is done strictly from left to right.
Step-by-Step Analysis of Numbers
Let's go through each number in the series and check its immediate neighbors:
| Number | Preceded By | Type | Followed By | Type | Condition Met? |
|---|---|---|---|---|---|
| 1 | & | Symbol | J | Letter | Yes |
| 5 | J | Letter | ! | Symbol | No |
| 7 | $ | Symbol | S | Letter | Yes |
| 9 | K | Letter | 3 | Number | No |
| 3 | 9 | Number | # | Symbol | No |
Identifying Numbers That Match
Based on the analysis in the table:
- The number 1 is preceded by the symbol $&$ and followed by the letter $J$. This matches the required pattern (Symbol Number Letter).
- The number 5 is preceded by the letter $J$, not a symbol. Therefore, it does not meet the condition.
- The number 7 is preceded by the symbol $ and followed by the letter $S$. This also matches the required pattern (Symbol Number Letter).
- The number 9 is preceded by the letter $K$, not a symbol. Therefore, it does not meet the condition.
- The number 3 is preceded by the number $9$, not a symbol. Therefore, it does not meet the condition.
Final Count
We found two numbers (1 and 7) that perfectly satisfy the condition of being immediately preceded by a symbol and immediately followed by a letter.
Therefore, there are two such numbers in the series.
Important Questions from Arrangement And Pattern (Notes)
- If the digits in the number '758462139' are arranged in ascending order, then how many digits remain in the same place?
Each of the digits in the number 8642571 is arranged in ascending order from left to right. What will be the sum of the digits which are fourth from the left and second from the right in the new number thus formed?
- Arrange the following is the correct sequence with regard to 'the five-stage model' of conditions required for learning.
(1) Transformation
(2) Presentation
(3) Engagement
(4) Reflection
(5) Exploration. - Arrange the steps of research in a sequential order
(1) Identifying a research problem
(2) Specifying the purpose for research
(3) Reviewing the literature
(4) Collecting the data
(5) Reporting and evaluating research
(6) Analysing and interpreting the data
Choose the correct sequence. Refer to the following letter, number, symbol series and answer the question that follows.
(Left) C H * * 8 5 9 * 4 9 1 6 5 L # 5 6 5 £ * K B (Right)
If all the numbers are dropped from the series, which of the following will be fifth from the left?
