Problem: How to check tire tread
Place a penny into any tread groove on your tire.
Rotate the penny so abraham lincoln's head is upside down and inside the tread.
Determine whether you can see lincoln's entire head when the penny is inserted into the tread groove.

Answer: Your tires are considered safe and legal if a portion of lincoln's head is covered by the tread. However, if you can see lincoln's entire head after inserting the penny into the groove, you may need to replace your tire.

Problem: How to make a simnel cake
Preheat the oven to 140c.
Prepare the cake pan by lining or greasing.
Rub the butter in with the sugar.
Add the eggs and beat through.

Answer: Add the flour and the chopped fruits. Pour half of the cake batter into the prepared cake pan.

Problem: How to curdle milk
Gently warm the milk.
Pour the milk into a saucepan and place the saucepan on the stove. Gradually warm the milk up over medium heat until steam just begins to form.
Answer: While the acid you will use in this method may curdle the milk on its own when used in large enough quantities, heat dramatically accelerates the process, making the milk curdle faster and more noticeably. This is especially important if you plan to separate the solid curds from the liquid whey, as you would do when making cheese.