Bing, exact same prompt, not using GPT-4 toggle:

This is a classic riddle. The answer is that ten elephants have 38 legs. Each elephant has 4 legs, so 10 elephants would have 40 legs. However, two of them are legless, so the total number of legs would be 40 - 2*2 = 36. Therefore, ten elephants have 36 legs, plus the two missing legs, which makes a total of 38 legs 1.