CTET Class I to V 2014 Sep Paper

Question : 45 of 150

Marks: +1, -0

Difference of (smallest common multiple of 4, 5 and 6) and (smallest common multiple of 5, 6 and 9) is

Solution:

Smallest common multiple or LCM of 4,5 and 6

=2 × 2 × 5 × 3=60

Now, smallest common multiple or LCM of 5,6 and 9

=3 × 3 × 2 × 5=90

Required difference

=90-60=30

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