Question

29. Find the smallest number which when increased by 20 is exactly divisible by 90 and 144.

Answer 1

Solution:-
LCM of 90 and 20=720

So,the smallest number which when increased by 20 is exactly divisible by 90 is:-
$= > 720 - 20 \\ = > 700$
Hence,700 is the number which when increased by 20 is exactly divisible by 90 and well as 20.