Question

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

Answer 1

Lcm of 90 n 144 =720
720-20=700
700 is the smallest no.

Answer 2

The smallest number which when increased by 20 is exactly divisible by 90 and 144 is given as -

First of all let us find a number which is exactly divisible by 90 and 144 like -
                90*8=720                         and                          144*5=720

Now,
To get  smallest number which when increased by 20 is exactly divisible by 90 and 144 do 
                           <                720 - 20 = 700                >

so, 700 is the smallest no. which when increased by 20 is exactly divisible by 90 and 144.

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Best of luck ;)
ROYALJATT