#76 Four hippos
The rangers at the Savannah Wilderness Experience are on a mission to weigh the four adult hippos in the park. Their scales can bear a weight of up to 4 tonnes, but are unreliable with anything below 2 tonnes, and all the hippos weigh less than that, so the rangers have had the smart idea of weighing the hippos in pairs.
The first five weighings are: 2.23, 2.35, 2.48, 2.72 and 2.85 tonnes.
The rangers now guide the two heaviest hippos onto the scales, but as the weighing is about to take place, the lightest hippo sneaks…
