**For video submission, choose one of the above for the video solution…. of course you can do all 3 (one video — one solution.)**

*Apart from solving it correctly, we are looking for a clearly communicated solution so that a viewer can understand the solution and learn from it.*

**You can get your teachers from Math Arena or your friends or parents to help you out recording your solution.**

- The figure below is made up of two adjacent squares and a shaded triangle. The smaller square has an area of 16 cm². The larger square has an area of 49 cm². What is the area of the shaded triangle?

This question is suited for P5 students.

**100 STARS for BEST VIDEO solution from a P5 student. P4 student will be awarded 120 STARS. P5/P6 olympiad students, you will be awarded 50 STARS only. P6 students, you will be awarded 50 STARS only.**

2. In the diagram, line segment PS has length 4. Points Q and R are on line segment PS. Four semi-circles are drawn on the same side of PS. The diameters of these semi-circles are PS, PQ, QR, and RS. The region inside the largest semi-circle and outside the three smaller semi-circles is shaded. What is the area of a square whose perimeter equals the perimeter of the shaded region?

P6 student should be able to answer this.

**100 STARS for BEST VIDEO solution from a P6 student. P4, P5 student will be awarded 120 STARS. P5/P6 olympiad students, you will be awarded 50 STARS only.**

3.

Olympiad style question. Divisibility is a popular question. This question is rated intermediate to hard.

**200 STARS for BEST VIDEO solution from any student.**

Previously

https://matharena.wordpress.com/2014/07/23/math-arena-video-competition-submissions/

You can search more through Google, just type “matharena video”