No of positive integral solutions of:

x1*x2*x3*x4*x5=840

Hi Satyaram,

Factorise 840.

840 = 2*2*2*3*5*7

Now from this find the number of ways in which, you can write this as a product of 5 numbers.

You need to do quite a bit of working on this.

Do not forget to include 1s when you are writing it as a product of 5 terms.

As for eg, one of the possibility can be 1*1*1*24*35.

So you need to find all such possibilities.

From here, you should do the workings.

Hope this helps.

Regards,

Ashwin (IIT Madras).

I got it as 3125.Is it correct?