Shortcuts in reasoning – Alphanumeric based symbols

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Shortcuts in reasoning – Alphanumeric based symbols Alphanumeric symbols (sometimes shortened to alphameric) is a combination of alphabetic and numeric characters. In some cases, it may include both upper and lower case letters, punctuation marks, and symbols (such as @, &, and *,). One of the most scoring question-type in MBA exams like NMAT, MBA CET, Bank PO, MAT etc is alphanumeric symbols puzzles. These questions are high scoring as they can be solved very quickly. Learning short cuts to handle these types of questions will significantly boost your reasoning score. Basic Terms: Before starting with the questions, let us understand the meaning of some words “following, followed by, preceding, preceded by”. Let us take two consecutive alphabets A and B. Here, A is preceding B and B is preceded by A. Also, B is following A and A is followed by B. Now, take three consecutive alphabets A, B and C. Here A and B are preceding C, but B is immediately preceding C whereas, A is not immediately preceding C. Similarly, B and C are following A, but B is immediately following A whereas, C is not immediately following A. Take a look at the following examples; DIRECTIONS for examples 1 to 5: Study the following digit-letter-symbol sequence carefully and answer the questions given below: 2 R * C f 8 E $ G 2 # 4 9 L c % B < K 1 & A W ? P e + Q @ 7 F 6 Example 1: If the above sequence is written in reverse order, then which element will be 5th to the right of 16th element from the right end? Solution: Since the entire sequence is reversed, therefore whatever we have to count from right now we will count from left in the given sequence. The 16th element from the left end is % and 5th to the left of % is #. Example 2: How many such numbers are there in the above sequence, each of which is immediately preceded by a consonant and immediately followed by a symbol? Solution: Check for the sequence Consonant-number-symbol. There are two such cases in the above sequence: G 2 #, K 1 Example 3: Which element is seventh to the left of sixteenth element from the left in the above sequence? Solution: The seventeenth element from the left is B. Now, we move 7th to the left of B, which is 2. Hence, 2 will be the answer. Example 4: If the first half of the series is written in reverse order, then which element will be twenty-first from the right end? Solution: There are a total of 32 characters in the above sequence. Since, the first half of the above sequence is reversed, therefore, when we have to count the 21st from the right the first 16 from the right will remain as it is, thereafter, the 17th onwards counting we will begin from the left end of the given sequence till we count 21st. So, the required character is f. Example 5: Which element will be twenty-first from the right end, if second half of the series is reversed? Solution: There are total 32 characters given in the above sequence. As only the second half is reversed and the 21st element from the right end falls in the first half, so we need not change the order. We simply count 21st from the right, which is = 4. Reasoning shortcuts in NMAT, Bank PO, MBA CET and SNAP.
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