Coding Decoding Reasoning Trick | Reasoning Trick | Maths Trick | imran sir maths

Summary

In this video, the speaker provides a step-by-step guide on solving coding and decoding questions commonly asked in exams. The video covers various techniques for decoding words into numeric codes, including simple letter-to-number conversion, adding numbers, reverse alphabet patterns, and using cross formations. Multiple examples from past exams (RRB, SSC, UPSC) are demonstrated, helping viewers understand how to apply these methods. The speaker encourages viewers to practice and engage with the content, making these complex problems easier to solve. By following the outlined logic, viewers can approach these problems with confidence.

Takeaways

• 😀 Focus on understanding how to decode coding-decoding questions, as these are commonly asked in exams like RRB, SSC, and UPSC.
• 😀 Use number-letter associations to decode words easily. For example, assign each letter a corresponding number to find the code.
• 😀 If a number sequence is given for decoding, match it to the letters of the word and look for patterns that can help in decoding efficiently.
• 😀 Remember the trick of adding a constant value (e.g., +4) to adjust the sum of numbers and make them match the given code.
• 😀 Reverse logic can be very helpful in solving tricky questions. Sometimes, working with reversed alphabetic order or using reverse number assignments can give the right answer.
• 😀 Don’t hesitate to write out the letter-number associations and numbers of the word you’re decoding to make the pattern clearer.
• 😀 If a decoding pattern is too complex, breaking it into smaller steps or checking for common patterns like +1, +2, etc., will help simplify it.
• 😀 Always check the options available after calculating your results, as sometimes the pattern will match only one specific option.
• 😀 Coding-decoding questions often require you to be quick with pattern recognition, so practice these techniques frequently.
• 😀 Pay attention to the type of coding used in the question – whether it's number-based, reverse-order based, or based on a trick like +4 or +10 additions.

Q & A

What is the main topic of the video?

The video focuses on solving coding-decoding questions that have appeared in various competitive exams. The presenter explains step-by-step methods to decode letters and numbers, using examples from previous exams.

How do you solve coding-decoding questions with letter-number pairs?

The basic method involves writing the number below each letter of the word or code. For example, in the 'MOTION' question, each letter is mapped to its corresponding code based on a given pattern, and the answer is derived by matching the sequence of numbers to the word.

How did the presenter solve the 'MOTION' question from RRB 2004?

The presenter mapped the letters of 'MOTION' to their respective codes from the provided sequence: M → 4, O → 8, T → 1, I → 5, O → 8, N → 6. The answer, 481586, matched option C.

What is the trick to solving the 'PLAY' code in the SSC CGL 2022 question?

The trick involves associating each letter with a number based on a mnemonic or pattern. For example, P = 16 (Prince), L = 12 (Love), A = 1, and Y = 25. Adding these numbers together gives 54, and adding 4 results in the final code of 58, which matches option B.

What is the method used to solve the 'THURSDAY' code question?

The 'THURSDAY' code is solved by comparing it to the given word 'STRAIGHT'. Each letter in 'THURSDAY' is matched with the corresponding letter in the pattern, resulting in the code 'HTRYSDAY', which matches option B.

How do you approach coding-decoding questions that involve reverse letter sequences?

For questions involving reverse letter sequences, the strategy is to match letters with their reverse positions in the alphabet. For example, in the 'WINTER' code, the reverse coding of letters was applied to deduce the correct code, which matched option B.

What was the solution to the 'WINTER' code in the UPSC 2004 question?

In the 'WINTER' code question, the presenter reversed the letters and applied the corresponding number values. After performing the necessary calculations, the code was found to be 'VIOUER', which matched option B.

How does the presenter explain the 'SAM' code from RRB 2004?

The solution to the 'SAM' code question involved using reverse letter mapping. By reversing the alphabet and applying the appropriate code for each letter in 'SAM', the answer was determined to be 8122, which matched option A.

What logic is used to solve the 'KETTLE' code in the SSC CGL 2019 question?

The 'KETTLE' code is solved using a pattern based on the letters in 'FRIDGE'. The presenter showed how each letter corresponds to the next in the sequence (e.g., K → L, E → F). Following this logic, the correct code was 'LFUUMF', which matched option B.

What are some strategies for solving complex coding-decoding questions in exams?

For complex coding-decoding questions, it's helpful to look for common patterns like reversing letters, using number-letter mappings, and adding/subtracting values. If you can’t find an immediate solution, experimenting with reverse coding or adding a fixed value (as shown in the 'SUMMER' example) can lead to the answer.