Question

Find the greatest number which divides 285 and 1249 leaving remainder 9 and 7

Answer 1

Subtract 9 and 7 from 285 and 1249

285-9= 276

1249-7=1242

find the HCF of 276 and 1242

276=2×2×3×23

1242=2×3×3×3×23

HCF= 2×3×23= 138

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