Chicken and rabbit in the same cage. There are six legs, and the key is wings.

If they are all dragonflies, they should have 2* 18=36 pairs of wings. Now there are only 28 pairs, and 36-28=8 pairs are missing. Because each cicada lacks 1 pair of wings, there are 8 cicadas, 18-8= 10 dragonfly.

2.

This number is a multiple of the least common multiple of 4, 5 and 8, and the least common multiple is 40. Find the multiple of 40 between 125 and 180.

40*4= 160

125< 160< 180

Fangfangpa 160 steps to find the treasure map.