## Ismaiel Kalady is teaching live on Unacademy Plus

L.C.M & H.C.F PART 2 SHORTCUT TRICKS FOR DEGREE LEVEL PSC

Course Contents Basic Concepts of LCM & HCF Finding LCM & HCF in 5 secs All varieties of Problems Advanced Tricks to solve LCM Problems Previous year Questions included

What is HCF? Highest Common factor Find it by Prime Factorization method

Finding HCF by prime factors Find H.C.F of 8,42 8 42 2 2 L

Finding HCF by prime factors Find H.C.F of 8,42 8 42 2/L 2 2 2 92X2X2 42 7x3x2

Finding HCF by prime factors Find H.C.F of 12,36 12.3 6 2112 12- 3X2x2

Finding HCF by prime factors Find H.C.F of 12,36 12,.3 6 2136 2L13 7/ 7 2112 3 12- 3X2x2 33x2x2 x2 HCF 3 x2x2

Shortest Method (in 5 secs) HCF will either be the smallest number or factors of the smallest number Find the H.C.F. of 24 and 56 24- 1*24, 2*12, 3*8, 4*6 So 8 is the HCF

Shortest Method (in 5 secs) Find H.C.F of 8,42 3 42 8- Smallest ho oy check factors

Shortest Method (in 5 secs) Find H.C.F of 12,36 12 36 12 Smallest number