BRAIN TEASERS FOR DUMMIES

Q: My skin is green and slippery, I've four legs and webbed feet, I hop on land and swim underwater, I love bugs and minimal fish to eat. What am I?138. I come in many alternative colours and I get bigger Once i’m entire. I'll float absent in case you don’t tie me down and I could make a loud sound if I split. What am I?c) A farmer has 19 sheep