The test !

Number Theory Level 1

In a test of statistics marks were awarded out of 40 . The average of 15 students was 38 .Later it was decided to give marks out of 50 . Then the new average of 15 students will now be

Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, conceptual quizzes.

Our wiki is made for math and science

Master advanced concepts through explanations, examples, and problems from the community.

Used and loved by 4 million people

Learn from a vibrant community of students and enthusiasts, including olympiad champions, researchers, and professionals.