Bank Exam Squares & Cubes Master – Page 3 (Big Set)
Shortcut Formulas • Fast Calculation • Step-by-Step Solutions
🔷 Core Formulas
(a + b)² = a² + 2ab + b²
(a − b)² = a² − 2ab + b²
(a + b)³ = a³ + b³ + 3ab(a+b)
(a − b)³ = a³ − b³ − 3ab(a−b)
🔷 Square Tricks
Q1. 52²
= (50+2)² = 2500 + 200 + 4 = 2704
Q2. 48²
= (50−2)² = 2500 − 200 + 4 = 2304
Q3. 35²
= 3 × 4 = 12 → 1225
Q4. 95²
= 9 × 10 = 90 → 9025
Q5. 105²
= 11025
Q6. 49²
= (50−1)² = 2500 − 100 + 1 = 2401
Q7. 51²
= (50+1)² = 2500 + 100 + 1 = 2601
Q8. 75²
= 7 × 8 = 56 → 5625
Q9. 85²
= 8 × 9 = 72 → 7225
Q10. 115²
= 13,225
🔷 Cube Tricks
Q11. 11³
= 1331
Q12. 12³
= 1728
Q13. 13³
= 2197
Q14. 15³
= 3375
Q15. 20³
= 8000
Q16. 9³
= 729
Q17. 8³
= 512
Q18. 25³
= 15625
Q19. 30³
= 27000
Q20. 18³
= (20−2)³
= 8000 − 2400 + 120 − 8 = 5832
🔥 Topper Tricks
- Use base (50, 100, 1000)
- Memorize squares up to 30
- Use (x±a) method
- Don’t multiply directly
Final Tip
Recognize Pattern → Apply Formula → Solve Fast
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