Question

Find the HCF of the following: i)115 and 138 ii) 42, 63 and 90 iii) 1197, 5320 and 4389 iv) 170 and 238

Answer 1

Answer:

1) 3×5×7×2

in last 23 is prime number

2) 7×3×10×1

in last 2,3,3 is left