"David collected 1p and 2p coins in a jar.
There are 374 coins in the jar.
The coins have a total value of £5.02.
Use algebra to find how many 1p and 2p coins there are in the jar."
"A,B,C and D lie on the circumference of a circle.
AB is parallel to CD.
BC is a diameter.
Prove the the triangles ABC and DCB are congruent."