Question

Look at the below figure, read the conversation between brother and sister. If she answers

theriddle correctly how ever will she pay for the pencils?​

Answer 1

Let the cost of each Pencil be ₹x

So, 5 Pencils will cost ₹5x

And, 7 Pencils will cost ₹7x

A.T.Q.

₹7x = ₹6 + ₹5x

₹2x = ₹6

₹x = ₹3

Therefore, the cost of 10 Pencils will be

₹10x = ₹10(3) = ₹30