if 7 pencils cost £1.68 how much will 10 cost?

what is a prime number?

1.68 / 7 = 0.24

0.24 * 10 = ?

http://www.mathsisfun.com/definitions/prime-number.html

To find out how much 10 pencils will cost, we can set up a proportion using the given information.

First, we need to find the cost of one pencil. We divide the total cost (£1.68) by the number of pencils (7):

£1.68 ÷ 7 = £0.24 per pencil.

Next, we can use this information to find the cost of 10 pencils. We multiply the cost per pencil (£0.24) by the number of pencils (10):

£0.24 × 10 = £2.40.

Therefore, 10 pencils will cost £2.40.