Question

find the greatest number of four digit exactly divisible by 8,12,15 and 20​

Answer 1

Answer:

To find out a number that is divisible by 8,12,15and20 we need to find the LCM of these numbers.

• L.C.M of 8, 12, 15, 20 = 120
• Also, we know that Greatest 4-digits number is 9999
• Now if we divide 9999 by 120 the remainder is 39
• ∴ Greatest number of 4-digits exactly divisible by 120

=9999−39

=9960

• Hence, 9960 is our answer.

Answer 2

Answer:

the answer is 9960

Step-by-step explanation:

To find out a number that is divisible by 8,12,15and20 we need to find the LCM of these numbers.

L.C.M of 8, 12, 15, 20 = 120  

Also, we know that Greatest 4-digits number is  9999

Now if we divide 9999 by 120 the remainder is 39  

∴ Greatest number of 4-digits exactly divisible by 120  

=9999−39

=9960

Hence, 9960 is our answer.

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