Question

in a hall there are 200 chairs the chairs number of prathamesh is divisible by9and 7 what would be the chair no of prathamesh

Answer 1

The chairs are labeled from 1 to 200

The chair number that lies between 1 and 200 and  is divisible by 7 and 9 is what we want.

In other words we are looking for the possible LCMs of 7 and 9 between 1 and 200.

They include :

63, 126,189

The possible sit numbers are :

63, 126 and 189

Answer 2

Solution :-

Total number of chairs = 200

Chair number on which Prathamesh is sitting, is divisible by 7 and 9 both.

So, we have to find the LCM of 7 and 9

LCM of 7 and 9

7 = 1 × 7

9 = 3 × 3

LCM = 3 × 3 × 7

= 63

So, LCM of 7 and 9 is 63

Now, the chair number of Prathamesh on which he is sitting is the multiple of 63.

Multiple of 63 from 1 and 200 (Both inclusive) are as follows.

63, 126 and 189

So, chair number of Prathamesh on which he is sitting is 63 or 126 or 189

Answer.