Which glass has the most water in it? It’s a trap for automatic thinking

This article will guide you through a picture IQ test that tests attention, logical thinking and the ability not to be fooled by first impressions.

IQ tests can be an enjoyable but sometimes tricky challenge for many people. It is said that regular practice can improve concentration and speed of judgement, and some studies suggest that short mental tasks can act as a “warm-up” for the brain. Pattern games, memorising short number sequences or simple crossword puzzles are also great for training attention. Today, we’re going to look at a puzzle that will test both your observation and your ability to think in context.

What’s in store for you today?

In the picture we see four glasses filled with water containing different objects – a fish, a dice, a paperclip and a tennis ball. Your task is to decipher which glass actually contains the largest amount of water. At first glance, this may tempt you to give a quick answer, but the puzzle will test whether you can take into account the volume of the objects submerged in the water.

Solving the riddle

Most of the water is in the jar with the paper clip. It occupies the smallest space of all the objects, so its jar contains the largest net volume of water. Other objects, especially the tennis ball, displace much more water, giving the impression of a higher level, but there is actually less.

If you enjoyed today’s test, try passing it on to friends or family and compare your answers. Small puzzles like this boost memory, increase concentration and keep the brain in good shape. And who knows – you might discover a hidden master of logic tasks among your loved ones.