The five questions everyone played that day, in the order they were asked, with the correct answers and why they are right.
Too few players took part this day for results to be shown.
What comes next? 31, 28, 31, 30, 31, …
These are the days in January, February (not a leap year), March, April and May. June comes next, with 30 days. Some sequences come from the real world rather than a formula.
Four friends each shake hands once with every other friend. How many handshakes are there?
Each of the 4 shakes 3 hands, giving 12, but every handshake is counted twice (once per person), so 12 ÷ 2 = 6. Halving to fix double counting works for any group.
One person knows a rumour. Every hour, everyone who knows it tells 2 new people. Roughly how many know after 10 hours?
The number who know triples each hour: 3¹⁰ = 59,049.
Order these countries from largest to smallest area.
Correct order
Russia is about 17.1 million km², Canada about 10.0 million, Australia about 7.7 million and India about 3.3 million.
Source: en.wikipedia.org
Roughly how old is the universe?
Measurements of the cosmic background radiation put the universe at about 13.8 billion years old — about three times the age of Earth.
Source: en.wikipedia.org
