2

3. The spider made a square grid web for catching flies. The flies could be trapped in white squares. Every day, the spider went through each place where a fly could have been caught. He moved vertically and horizontally, passing through squares only once. He could not move diagonally. He was also not able to move across black squares. Continue tracing spider’s path so he comes back to his starting point.

4. Before PE class, the students from the school on island A have to go to the gym hall on island B. However, the teacher who leads them there does not take the shortest way, but warms up the students first by taking them across all eight bridges, marked with numbers 1-8, before they go to the gym hall. The students have to walk across all the bridges, but cannot cross the same bridge twice. Draw their path.