Here are the prices for 1st and 2nd class mail within the UK:

Weight up to First Class Second Class
60g 27p 19p
100g 41p 33p
150g 57p 44p
200g 72p 54p
250g 84p 66p
300g 96p 76p
350g £1.09 87p
400g £1.30 £1.05
450g £1.48 £1.19
500g £1.66 £1.35
600g £2.00 £1.60
700g £2.51 £1.83
750g £2.69 £1.94*
800g £2.91
900g £3.20
1kg £3.49

Costs for First Class items over 1kg are £3.49 and then 85p for each extra 250g.
*Items over 750g cannot be sent second class.

You have an unlimited number of each of these stamps:

4p stamp 10p stamp 19p stamp 27p stamp 37p stamp £1.00 stamp
4p
10p
19p
27p
37p
£1.00

Reproduced by kind permission of Consignia plc. All rights reserved.

Which stamps would you need to post a parcel weighing 825g?

I want to send a package 1st class which weighs 235g. It is very small so I want to use as few stamps as possible. Which ones would I use?

If I only had 3 of each kind of stamp, which 2nd class price could I not make?

How many different combinations of stamps could be stuck on a letter weighing 140g if it goes 1st class?

I use the following stamps to send two items, one 1st class and the other 2nd class:

E stamp 1st class stamp 2nd class stamp 10p stamp 10p stamp 4p stamp 4p stamp

What could their weights be?

All tables reproduced by kind permission of Consignia plc. All rights reserved.