20 Feb - Aptitude - Coding Decoding
Duration: 1 hr 30 min
This video lesson is available to enrolled students.
AI Summary
An AI-generated summary of this video lecture.
This comprehensive lecture by Sanchit Jain, also known as Yash Bhaiya, focuses on the topic of Coding Decoding for competitive exams like GATE. The session begins with an introductory sequence featuring names and song lyrics before transitioning into the core academic content. The instructor systematically breaks down the prerequisites for mastering coding, emphasizing the need for knowledge of alphabets (ABCD), numbers (1234), logic building, patience, and a calm mind. A significant portion of the lecture is dedicated to teaching mnemonic devices to memorize the numerical positions of letters, such as EJOTY and specific associations like F-6 (Fix Six) and G-7 (Group of Seven). The instructor uses a story-based mnemonic involving a character named Aziz to help students remember complex letter-number associations. The lecture then moves into solving various types of coding problems, including letter coding, number coding, symbol coding, and mixed language coding. Specific examples like CAT to TAC, SUNSHINE to TVOTIJOF, and SNOW to 7100 are worked through in detail, demonstrating different patterns such as reversing, shifting, alternating operations, and summing positions. The instructor also covers conjugate pairs (A-Z, B-Y) and their application in summing codes. The session concludes with miscellaneous types of questions, including word formation from a given word, alphabetical arrangement, and color coding riddles, ensuring students are prepared for a wide range of question formats found in exams.
Chapters
0:00 – 2:00 00:00-02:00
The video opens with a series of title cards displaying names such as Sanchit Jain, Yash Bhaiya, and Pratiksha Petkar against a black background. This is followed by a sequence of slides featuring song lyrics in Hindi, specifically 'Aarambh hai prachand bol mastakon ke jhund', set against a sunset sky backdrop. The text 'MUSIC...' appears intermittently, indicating an audio track is playing. This introductory segment serves as a prelude to the lecture, establishing the branding and setting a motivational tone before the academic content begins.
2:00 – 5:00 02:00-05:00
The song lyrics continue to be displayed on screen with the sunset background. The text 'Aarambh hai prachand' is repeated, reinforcing the motivational theme. The instructor's face appears in a small window in the top right corner, but the primary focus remains on the lyrics and the 'MUSIC...' text. This section acts as a buffer, allowing students to settle in while the audio plays. The visual consistency of the sunset and text maintains a calm atmosphere before the transition to the formal lecture slides.
5:00 – 10:00 05:00-10:00
The lecture officially begins with a slide titled 'What Coding Decoding Actually Is ??'. An example question is presented: 'CAT is coded as DBU, then MAN is coded as ___'. The instructor then displays a 'Pre-requisites' slide, listing five key requirements: ABCD, 1234, Logic Building Ability, Patience, and 'Khujli less mind and body'. He emphasizes the importance of these foundational elements, marking them with red checkmarks. This section sets the stage by defining the topic and outlining the necessary skills for success.
10:00 – 15:00 10:00-15:00
The instructor introduces mnemonic devices for remembering letter positions. A slide lists associations like 'F - 6 (FIX SIX)', 'G - 7 (GROUP OF SEVEN COUNTRIES)', 'H - 8 (SEE THE STRUCTURE OF H)', and 'I - 9 (I KNOW)'. He also writes 'E J O T Y' on the board, a common mnemonic for the 5th, 10th, 15th, and 20th letters. The slide includes a grid showing the alphabet with corresponding numbers. This segment focuses on memory aids to speed up problem-solving during exams.
15:00 – 20:00 15:00-20:00
The mnemonic lesson continues with more letter-number associations. The slide lists 'L - 12 (Ladki ko dekhte he Ladko ke 12 baj jaate hain)', 'M - 13 (Mein Tera)', 'N - 14 (14 feb ko Nahakar jaana bahar)', and 'S - 19 (15 se 18/19 saal tak ke baccho ko ORS pilao)'. The instructor writes these on the board alongside the EJOTY mnemonic. He also introduces the concept of conjugate pairs, writing 'A-Z', 'B-Y', etc., and explains how they sum to 27. This builds upon the previous section to provide a complete set of memory tools.
20:00 – 25:00 20:00-25:00
A story-based mnemonic is introduced to help remember specific letter positions. The text describes a character named 'AZIZ' who is a 'BOY' with an 'EVS Exam'. He watches a 'FALTU Movie' and has 'CRUX & DEW' there. The story continues with 'GREAT' mind, 'HIGHER SECONDARY & INTER' results, and a father angry about his act, deciding to marry him with 'JUNGLE QUEEN'. The instructor underlines key words like 'BOY', 'EVS', 'FALTU', 'CRUX', 'DEW', 'GREAT', 'HIGHER', 'SECONDARY', 'INTER', 'JUNGLE', 'QUEEN', 'KURTA', 'PYJAMA', 'LOTTO', and 'MAN'. This creative approach links letters to memorable phrases.
25:00 – 30:00 25:00-30:00
The instructor moves to solving specific coding problems. The first example is 'CAT is coded as TAC', which is a simple reversal. The next example is 'CATACOMBA is coded as MBACATACO', demonstrating a shifting pattern where the last letter moves to the front. He then presents 'SUNSHINE is coded as TVOTIJOF', analyzing the pattern as alternating +1 and -1 shifts for each letter. This section transitions from theory to practical application, showing how to identify and apply patterns.
30:00 – 35:00 30:00-35:00
More complex coding patterns are explored. The question 'TAPPU is coded as RYNNS' is analyzed, showing a pattern of -2, +1, +1, +1, -1. The instructor then asks how 'SONU' will be coded using the same logic. Another example, 'SUNSHINE is coded as SVPVLNTL', is presented, where the pattern involves alternating +0, +1, +2, +3, etc. The instructor writes out the steps on the board, demonstrating how to decode the sequence. This reinforces the skill of identifying non-standard patterns.
35:00 – 40:00 35:00-40:00
The lecture shifts to number coding. The question 'SNOW is coded as 7100' is solved by summing the positions of the letters (S=19, N=14, O=15, W=23). The instructor then asks how 'WALL' will be coded using the same method, calculating 23+1+12+12=4800. He also introduces a question about 'GIRLFRIEND', asking for its code based on the same summing logic. This section teaches students how to convert letters into numbers and perform arithmetic operations.
40:00 – 45:00 40:00-45:00
A new coding method is introduced using conjugate pairs. The question 'CAP is coded as 61' is solved by summing the conjugate pairs: C(3)+X(24) + A(1)+Z(26) + P(16)+K(11) = 61. The instructor then asks how 'PEN' will be coded using this method, calculating P(16)+K(11) + E(5)+V(22) + N(14)+M(13) = 46. He also presents a question about 'GIRL', asking for its code. This section introduces a more advanced technique involving the sum of opposite letters.
45:00 – 50:00 45:00-50:00
The instructor continues with symbol coding. The question 'RADAR is coded as *?*?#' and 'DOOR is coded as ?%?#' is presented. He deduces that D=#, O=%, R=?, A=*. He then asks how 'DAM' will be coded, writing '#*?'. He also introduces a question about 'FIRE is coded as #*?%', asking how 'FREEZE' will be coded. This section teaches students how to map letters to symbols and identify unique mappings.
50:00 – 55:00 50:00-55:00
The lecture covers mixed language coding. The question 'hu ma sam means Water is life', 'sam na zo means Glass of water', and 'chi zo ma means life of PI' is presented. The instructor analyzes the common words to deduce that 'ma' means 'life', 'sam' means 'water', and 'zo' means 'of'. He then asks which word represents 'PI', identifying 'chi'. This section teaches students how to solve coding problems by comparing multiple sentences to find commonalities.
55:00 – 60:00 55:00-60:00
A complex coding problem is presented: 'SLOW MOVE, GET BACKWARDS, FIRE AWAY is written as VFMD ZMWE, BEN PCTLDCOXV, QHOE CDCI'. The instructor analyzes the pattern, noting that 'SLOW' becomes 'VFMD' (reverse +1). He then asks how 'BRICKS' will be written. He also covers a color coding question: 'blue means green, green means yellow...', asking for the color of human blood. This section combines multiple coding techniques and logical reasoning.
60:00 – 65:00 60:00-65:00
The instructor solves the 'BRICKS' coding problem, applying the reverse +1 pattern to get 'POHTLV'. He then moves to a word formation question: 'Out of the given options, find which word can be formed from this given word. Given Word: STRANGULATION'. He checks the options 'TRAUGAB', 'NATION', 'LAMINATE', 'TIRANED', identifying 'NATION' as the correct answer. This section tests the ability to form words from a given set of letters.
65:00 – 70:00 65:00-70:00
A question about alphabetical arrangement is presented: 'If the letters if the word GIRLFRIEND are arranged alphabetically, then which letter would be farthest from the first letter word?'. The instructor also covers a question where 'WRONG is coded as GNORW', which is a simple reversal. He asks how 'RIGHT' will be coded, identifying 'GHIRT'. This section focuses on rearranging letters and identifying simple reversal patterns.
70:00 – 75:00 70:00-75:00
The instructor continues to solve the 'RIGHT' coding problem, confirming the answer is 'GHIRT'. He then shows a screenshot of the 'Knowledge Gate' website, displaying a bundle of courses including 'Welcome Guide', 'Gate Live Classes', and 'Discrete Mathematics'. This segment serves as a promotional break, showing students where they can find more resources and courses related to the lecture content.
75:00 – 80:00 75:00-80:00
The instructor's face is shown in the top right corner as he continues to speak. The screen displays the 'Knowledge Gate' website again, showing the 'GATE Guidance by Sanchit Sir' bundle. The content includes '20 Courses' and is valid for 526 days. This section reinforces the availability of the course material and provides a visual reference for students interested in enrolling.
80:00 – 85:00 80:00-85:00
The instructor is shown in a close-up shot, wearing a white shirt with the 'KG' logo. He appears to be concluding the lecture or transitioning to a new segment. The background is blurred, keeping the focus on the instructor. This visual change signals a shift in the video's focus, possibly moving from the lecture content to a closing statement or Q&A session.
85:00 – 89:38 85:00-89:38
The video ends with the instructor speaking directly to the camera. The screen remains focused on him as he wraps up the session. The 'KG' logo is visible on his shirt. This final segment serves as a conclusion to the lecture, providing a personal touch and potentially answering final questions or giving encouragement to the students.
The lecture provides a thorough and structured approach to mastering Coding Decoding, a critical section for competitive exams. It begins by establishing the necessary prerequisites, emphasizing that success relies not just on rote memorization but on logic building and patience. The instructor's use of mnemonics, such as EJOTY and story-based associations like the 'Aziz' story, is a key pedagogical strategy that helps students retain complex information like letter positions. The progression from basic letter coding to more advanced number and symbol coding demonstrates a logical flow, building complexity gradually. The instructor solves a wide variety of problems, including reversal, shifting, alternating operations, and summing positions, ensuring students are exposed to different patterns. The inclusion of mixed language coding and word formation questions adds depth, covering the full spectrum of question types. The use of visual aids, such as slides with clear text and board writing, enhances understanding. The lecture concludes with a promotional segment for the 'Knowledge Gate' platform, connecting the educational content to further learning resources. Overall, the session is designed to equip students with both the theoretical knowledge and practical problem-solving skills needed to excel in coding decoding questions.