Summary of "Bihar Jeevika Bharti 2025 | Reasoning & Aptitude Class-04 | Full Syllabus | Previous Year Question"

Summary of Bihar Jeevika Bharti 2025 | Reasoning & Aptitude Class-04

Main Ideas, Concepts, and Lessons:

  1. Introduction and Exam Context:
  2. Reasoning Questions and Problem-Solving Techniques:
    • Order and Ranking Problem:
      • Given positions of two persons in a row (Chhotu 10th from left, Kalu 20th from right) and 5 persons between them.
      • Two cases considered; for maximum number of persons, sum positions and persons between: 10 + 5 + 20 = 35.
      • Important: The word "maximum" allows a definitive answer; without it, the total cannot be determined.
    • Counting Squares in a Figure:
      • A square divided by a plus sign creates 5 smaller squares (4 small + 1 big).
      • By identifying such patterns and summing them, the total number of squares is counted.
      • Practice and parsing skills are essential to solve these questions quickly.
      • Example calculation reached 16 squares, with option A as the answer.
      • Later, a more complex figure was analyzed using the formula: sum of squares of parts (e.g., 4² + 3² + 2² + 1² = 30) plus additional combined squares, totaling 36.
    • Nonverbal Series Question:
      • Identify the pattern of movement or position changes in symbols or letters.
      • Example: Movement of a star or letter from corner to middle or vice versa.
      • Approach: Analyze movement from one figure to the next, then apply the same logic to find the missing element.
      • Use elimination based on pattern inconsistencies.
    • Inserting Missing Characters:
      • Identify numerical or alphabetical patterns.
      • Example: Numbers like 65, 11, 1 and 48, 12, 2 analyzed by summing digits or multiplication.
      • Practice helps in recognizing these patterns.
    • Figure Completion and Space Visualization:
      • Complete incomplete figures by identifying missing parts based on symmetry or continuation of lines.
      • Use elimination of options that do not fit the pattern.
      • Not necessary to complete the entire figure; focus on distinctive differences.
    • Alphabetical Problems:
      • Counting pairs of letters in a word (e.g., "REFRESHING") where the number of letters between them in the word equals the number of letters between them alphabetically.
      • Method: Check forward and backward positions with respect to the English alphabet.
      • Example answer: 3 such pairs in "REFRESHING".
    • Mathematical Reasoning with Unusual Equations:
      • Example: 32 * 5 = 25; 19 * 4 = 40; find 54 * 3.
      • Approach: Sum digits of the first number and multiply by the second number’s last digit.
      • Result: 27.
    • Counting Frequency of Digits in Numbers:
      • How many times a digit (like 1 or 2) appears in numbers from 1 to 100.
      • Example: Digit '1' appears 21 times.
      • Important to count occurrences in all places (units, tens).
    • Day Calculation Problems:
      • Find the day after a given number of days/weeks/months from a known day.
      • Key point: Without knowing the exact month or days in months, some problems cannot be solved definitively.
      • Method: Divide total days by 7, remainder added to the current day gives the answer.
    • Clock Angle Problems:
      • Total degrees in a circle: 360°; divided into 12 hours → each hour = 30°.
      • At 9:00, minute and hour hands form a 270° angle (external angle).
      • At 6:00, angle formed is 180°.
      • At 3:10, calculate angle considering hour hand moves 0.5° per minute.
    • Directional Reasoning:
      • Use "Zee News" mnemonic to remember directions: N (top), E (right), S (bottom), W (left).
      • Track movements stepwise: walk north 10 km, turn right 15 km, turn right 30 km.
      • Use Pythagoras theorem to calculate shortest distance.

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