Choose the picture that would go in the empty box so that the two bottom pictures are related in the same way as the top two are related.
Shown below on the left are two views of a bent wire. Which option is the top view of the wire?
The diagram below shows a river system consisting of 7 segments, marked P, Q, R, S, T, U, and V. It splits the land into 5 zones, marked Z1, Z2, Z3, Z4, and Z5. We need to connect these zones using the least number of bridges. Out of the following options, which one is correct? Note: