1.

Find the least number of 5 digits which is exactly divisible by 12 15 and 18

Answer» LCM of 12,15 & 18 = 180

if you DIVIDE 10000 by 180
180)10000(56 \\ \: \: \: \: \: \: \: \: \: \: 900 \\ \: \: \: \: - - - - - \\ \: \: \: \: \: \: \: \: \: \: \:1000 \\ \: \: \: \: \: \: \: \: \: \: \: 1080
here we see 1080-1000=80

least number of 5 digits which is exactly divisible by 12 15 and 18 = 10000+80=10080


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