TRICK–3 : ODD–EVEN ELIMINATION
(बिना calculation, सिर्फ़ parity से option काटना)
👉 कब इस्तेमाल करें?
Multiplication / Addition / Subtraction
Square / Power वाले सवाल
Options में odd–even mix हो
🧠 Basic Rules (याद रखिए)
Even × Anything = Even
Odd × Odd = Odd
Even + Even = Even
Odd + Odd = Even
Odd + Even = Odd
🔹 STEP–BY–STEP EXAMPLES
Example 1
15 × 14 = ?
14 even है
👉 answer even होगा
Options:
A) 211 (odd ❌)
B) 210 (even ✔)
C) 209 (odd ❌)
D) 215 (odd ❌)
✔ Answer: B
Example 2
(7 × 9) + 4 = ?
7×9 = odd × odd = odd
odd + even = odd
Options:
A) 63 (odd ✔)
B) 67 (odd ✔)
C) 65 (odd ✔)
D) 66 (even ❌)
👉 यहाँ 66 तुरंत कट गया
❌ Instant Elimination
अगर answer even होना चाहिए, तो सारे odd options काटो
अगर answer odd होना चाहिए, तो सारे even options काटो
🧪 PRACTICE QUIZ (10 Questions)
Q1. 13 × 14 = ?
A) Odd
B) Even
✔ Ans: B
👉 Even × Anything = Even
Q2. 25 × 17 = ?
✔ Ans: Odd
👉 Odd × Odd = Odd
Q3. 18 × 22 = ?
✔ Ans: Even
Q4. 9 × 9 = ?
✔ Ans: Odd
Q5. 7 × 16 = ?
✔ Ans: Even
Q6. 21 × 23 = ?
✔ Ans: Odd
Q7. 32 × 15 = ?
✔ Ans: Even
Q8. (11 × 12) + 5 = ?
✔ Ans: Odd
👉 Even + Odd = Odd
Q9. (19 × 19) − 4 = ?
✔ Ans: Odd
👉 Odd − Even = Odd
Q10. (24 × 35) + 6 = ?
✔ Ans: Even
👉 Even + Even = Even
🔥 EXAM HALL TIP
अगर options हों:
दो odd
दो even
👉 पहले parity से 50% eliminate करो, फिर दूसरी trick लगाओ।