Quant Hacks- Shortcut to find whether a number is prime or not (Episode 23)

Our next quant hack by Saurabh Kothari Sir where he find the integral solutions using a shortcut. PREVIOUS EPISODES: Episode 1: Trick to solve probability dice questions in 1 minute!: https://youtu.be/8KmC78mdxwA Episode 2: Trick to find prime numbers between 0-100: https://youtu.be/tmBvg51oTLY Episode 3: Shortcut to solve compound interest questions without formula: https://youtu.be/KonFsiGnoMM Episode 4: Shortcut to solve Trigonometry questions in 1 minute: https://youtu.be/pfMmETqD9SA Episode 5: Shortcut to find number & sum of factors: https://youtu.be/ORHvQ7iUwaA Episode 6: Quant HACKS- Shortcut to solve replacement questions in 1 minute: https://youtu.be/9_cVq6pHd8s Episode 7: Shortcut to find "Unit Digit" in Number System: https://youtu.be/g4t3rPcVqGU Episode 8: Shortcut to solve "Algebra" questions in 10 seconds : https://youtu.be/mKHiQhVmZzw Episode 9: Shortcut to solve "Simplification" questions in 3 seconds : https://youtu.be/NKgwex13WdE Episode 10: Shortcut to solve "Remainder" questions in 10 seconds: https://youtu.be/bFAywUjtecU Episode 11: Shortcut to find square of any number ending with '5': https://youtu.be/wpcfFROYkfg Episode 12: Shortcut to multiply any numbers in 5 seconds: https://youtu.be/kS_cExSLXtg Episode 13: Number System in 10 seconds | Wilson's Theorem | Euler's Theorem | Fermat's Theorem: https://youtu.be/M7ZihOCuL4Q Episode 14: The Chinese Remainder Theorem: https://youtu.be/hsIsUaoGV50 Episode 15: Find cube root of any number in 5 seconds: https://youtu.be/hgYfuRZYigU Episode 16: Find Square & square root of special numbers in 5 seconds: https://youtu.be/9mbjkmAXcUc Episode 17: Understand maxima & minima of quadratic equations in 30 seconds: https://youtu.be/bAP66t1Tdbk Episode 18: Shortcut to find integral solutions in 15 seconds: https://youtu.be/zj-5KhcBtSs Episode 19: Shortcut to solve Surds & Indices questions in 10 seconds: https://youtu.be/gu0XHDLCTOY Episode 20: Shortcut to find maxima & minima of modulus function: https://youtu.be/L8rOXrzQcMM Episode 21: Shortcut to solve Probability & Bayes' theorem questions: https://youtu.be/omNy35ppxhA Episode 22: Shortcut to solve Time, speed & distance questions: https://youtu.be/dR_J8d2VPzk