Price: Free to download; In-app purchases: $0.99-$299.99; Size: Varies with device; Google Play rating: 4.7 out of 5 stars; Photomath is probably the best math problem-solving app for most users.

Solving problems in Euclidean geometry is one of four topics covered by IMO problems — the others cover the branches of number theory, algebra and combinatorics.

Many students find algebra a confusing or intimidating subject, especially those who have just started middle school. But in reality, it is not a difficult subject. With the right strategies and ...