Question

7. Find the L.C.M. of 140 and 168. Use the L.C.M. obtained to find the H.C.F. of the given
numbers.​

Answer 1

Answer:

Step-by-step explanation:FIND THE LCM OF 140 AND 168

140=2×2×7×5

168=2×2×2×3×7

LCM=2×2×2×3×7×5=8×3×7×5=24×35=840

HCF(a,b) ×LCM(a,b) = a×b

HCF ×840= 140 × 168

HCF= 140 ×168/840

       =28