Puzzle for Today
Puzzle No. 546鈥� Thursday 15 August
Some students will pick up Core Maths results today, an alternate course to A-Level. Here is a typical question. Tom buys t-shirts for £22.50 each. Tom has to decide what price he wants to put on each t-shirt. If he doesn’t sell them all, he will reduce his price by 10%.He still wants to make 20% profit on the cost of each reduced-priced t-shirt. What should the price be for each t-shirt?
Today's #PuzzleForToday has been set by Bobby Seagull and fellow maths teacher Susan Okereke, who are both co-hosts of the Maths Appeal podcast.
Click here for the answer
£30.
Let P be the original price of the t-shirt that Tom will look to sell.
Then if he doesn’t sell them all, the price will be discounted to 0.9 P (This is 100% - 10% discount).
This 0.9P still needs to give Tom a 20% profit on his purchase price of £22.50. This is 1.2 x £22.50 = £27.
So 0.9 P = £27.
£27/0.9 = £30 for original selling price of t-shirt.
-
![]()
Puzzle for Today 鈥� Index
Find all of the currently available Puzzles for Today, with answers.
More fiendish brain-teasers and quizzes on 大象传媒 Radio...
-
![]()
From autumn leaves to the magic roundabout: test yourself with our favourite quizzes.
-
![]()
We asked the intelligence agency to set our listeners a code-cracking challenge... Can you solve it?
-
![]()
Quiz: How many of these Mastermind music questions can you answer?
Here's a chance to find out whether your specialist subject on Mastermind could be the entire history of music.
-
![]()
Six conundrums to grapple with, including the Riddle of the Sphinx. Try not to forfeit your life...
