This logic puzzle, featuring an image of a group of people on a camping holiday, has gone viral in recent days - but very few people are able to get the answers right.
The puzzle, which comes from an old children's magazine, is designed to test your powers of observation, logic and reasoning.
Take a look at the picture below - and see how many of the nine questions below you can answer.
The questions (answers below)
1. How many tourists are staying at this camp?
2. When did they arrive: today or a few days ago?
3. How did they get here?
4. How far away is the closest town?
5. Where does the wind blow: from the north or from the south?
6. What time of day is it?
7. Where did Alex go?
8. Who was on duty yesterday? (Give their name)
9. What day is it today?
1. There are four tourists. See the four sets of cutlery on the picnic blanket and four names on the duty list.
2. They arrived a few days ago - long enough for a spider to build a web between their tent and a tree.
3. They got there by boat, judging be the oars next to the tree.
4. The closest village is not far - the chicken wouldn't be walking around in the area otherwise
5. The wind is blowing from the south. The flag on top of the tent shows the wind direction and, looking at the trees, branches on the southern side are normally longer.
6. It's morning. The shadows show the sun is to their east.
7. Alex is catching butterflies - see the scoop net behind the tent.
8. Colin was on duty yesterday. He's looking for something in his backpack, which is marked with a "C". Alex is catching butterflies. James is taking pictures. Peter is on duty today, and Colin was on duty yesterday.
9. It's August 8th - because Peter is on duty and there is a watermelon on the ground. Watermelons ripen in August. Apparently.
The Telegraph, London