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Question

In a certain code language, 'RA + FE' is coded as ‘246', and 'AB + JC' is coded as ‘115'. How will 'AC + BD' be coded in that language?

The correct answer is

37

Solving the Code Language Puzzle

This question asks us to decipher a specific code language where combinations of letters are assigned numerical values. We are given two examples of this coding pattern and need to apply the same logic to a new letter combination.

Analyzing the Given Code Language Examples

Let's carefully examine the examples provided to find the underlying rule:

  • Example 1: 'RA + FE' is coded as '246'.
  • Example 2: 'AB + JC' is coded as '115'.

We need to figure out how the letters 'RA', 'FE', 'AB', and 'JC' are converted into numbers and how the '+' symbol is used.

Finding the Pattern in Letter Coding

A common pattern in letter coding puzzles involves the alphabetical position of letters. Let's list the positions of the letters used in the examples:

  • R: 18th letter
  • A: 1st letter
  • F: 6th letter
  • E: 5th letter
  • B: 2nd letter
  • J: 10th letter
  • C: 3rd letter

Consider the first example: 'RA + FE' → '246'.

If we look at the positions of R (18) and A (1), and F (6) and E (5), how can we get 246?

Let's try combining the positions. What if the two letters before '+' form a number, and the two letters after '+' form another number, and these two numbers are added?

  • For 'RA', positions are 18 and 1. If we concatenate these, we get 181.
  • For 'FE', positions are 6 and 5. If we concatenate these, we get 65.

Let's add these concatenated numbers: $181 + 65 = 246$. This matches the first example!

Let's test this pattern with the second example: 'AB + JC' → '115'.

  • For 'AB', positions are 1 and 2. If we concatenate these, we get 12.
  • For 'JC', positions are 10 and 3. If we concatenate these, we get 103.

Let's add these concatenated numbers: $12 + 103 = 115$. This matches the second example as well!

The pattern is consistent. The rule is to take the alphabetical positions of the two letters in each pair, concatenate them to form a number, and then add the two resulting numbers.

Code Language Pattern Derivation
Letter Pair Letter Positions Concatenated Number Calculation Coded Value
RA R=18, A=1 181 $181 + 65 = 246$ 246
FE F=6, E=5 65
AB A=1, B=2 12 $12 + 103 = 115$ 115
JC J=10, C=3 103

Applying the Pattern to 'AC + BD'

Now we apply the same rule to the expression 'AC + BD'.

First, find the alphabetical positions of the letters in 'AC':

  • A: 1st letter
  • C: 3rd letter

Concatenate their positions to form a number: 13.

Next, find the alphabetical positions of the letters in 'BD':

  • B: 2nd letter
  • D: 4th letter

Concatenate their positions to form a number: 24.

Finally, add the two numbers obtained:

Value of 'AC' + Value of 'BD' $= 13 + 24$.

Calculating the Final Coded Value

Performing the addition:

$13 + 24 = 37$

Therefore, 'AC + BD' will be coded as '37' in this language.

Revision Table: Key Steps in Decoding

Steps to Solve Code Language Problem
Step Description 'AC + BD' Application
1 Understand the problem and given examples. Analyze 'RA+FE=246' and 'AB+JC=115'.
2 Identify the pattern by analyzing letter-to-number mapping. Discover the concatenation of alphabetical positions.
3 Apply the identified pattern to the new expression. Decode 'AC' and 'BD' using alphabetical positions.
4 Perform the required mathematical operation (addition in this case). Add the values for 'AC' and 'BD'.
5 State the final coded value. The result is 37.

Additional Information: Types of Letter Coding

Letter coding puzzles often involve various patterns. Some common types include:

  • Alphabetical Position: Using the A=1, B=2, ... Z=26 system directly.
  • Reverse Alphabetical Position: Using Z=1, Y=2, ... A=26 system.
  • Skipping Letters: Coding based on letters placed at a fixed distance in the alphabet.
  • Jumbling or Rearrangement: The letters within a word are rearranged according to a rule.
  • Symbol Coding: Replacing letters with symbols.
  • Mixed Coding: A combination of numbers, symbols, or other letters.

Solving these puzzles requires careful observation, logical reasoning, and testing different possible patterns based on the given examples.

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Important Questions from Operations on Place Value

  1. A group of tourists from Australia visited New Delhi for sight-seeing. On a particular day, $\frac{1}{3}$ of them visited Qutub Minar, four times the square root of the total number of tourists visited Red Fort and the remaining 18 tourists were seen walking on the Kartavya Path near the India Gate. What is the total number of tourists who went out for sight-seeing on a particular day?

  2. Anjali and Sanjana have some marbles with them. If Sanjana gives 15 marbles to Anjali, Anjali will have 10 marbles less than twice the marbles with Sanjana. If Sanjana gives 40 marbles to Anjali, Anjali will have 20 marbles more than three times the marbles with Sanjana. Find the number of marbles with Anjali.

  3. If 1 is added to each even digit of the number 85624179 then the digits are arranged in ascending order from left to right. Find the product of the digits which are second from the left end and third from the right end.

  4. If 1 is added to each odd digit and 2 is added to each even digit in the number 6134527, what will be the sum of the last and first digits of the new number thus formed?
  5. In a certain code language, 'FALF' is written as 'HCJD'. How will 'OEMC' be written in that language?

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