This riddle has been around for some time on internet platforms such as Instagram, Facebook, and WhatsApp, and many people still argue over what the answer might be, as there are many possibilities. The correct answer is 28 days. Until the 27th night, the frog would have managed to scale a height of 1 meter per day or 27 meter in total. On the 28th day, he would have climbed 3 meters during the day thereby completing his task.