Logical Reasoning
You have a 3-litre jug and a 5-litre jug. How do you measure exactly 4 litres?
Fill the 5L, pour into 3L until full, leaving 2L in the 5L. Empty the 3L. Pour the 2L in. Fill the 5L again, pour 1L into the 3L (which already has 2L). 4L remains in the 5L.
How many sides does a hexagon have?
Six
You set an alarm for 7am, fall asleep immediately at 6:30pm, and the alarm goes off. How long did you sleep?
12.5 hours
A rooster lays an egg on the peak of a roof. Which way does it roll?
Roosters don't lay eggs.
What planet is closest to the sun?
Mercury
You're making a sandwich and realize you've run out of bread. What's the minimum number of trips to the store you need?
One
There are 10 people in a room. Everyone shakes hands with everyone else exactly once. How many handshakes is that?
45. Formula: n(n-1)/2 = 10×9/2.
Who painted the Mona Lisa?
Leonardo da Vinci.
If you have 3 pairs of socks in a drawer (red, blue, green) and pick them out in the dark, how many do you need to pull out to guarantee a matching pair?
Four
I have two coins totalling 30 cents. One is not a nickel. What are the two coins?
A quarter and a nickel. "One is not a nickel" — but the other one is.
What is the name of the chart type that shows parts of a whole as slices?
Pie chart or Donut Chart
You're late to a meeting that started 10 minutes ago and runs for 30 minutes. What fraction of the meeting have you missed?
One third
A man builds a house with four walls, all facing south. A bear walks by. What color is the bear?
White. This only works at the North Pole, so it's a polar bear.
How many times does the digit 9 appear if you write out all numbers from 1 to 100?
20 times — 9, 19, 29, 39, 49, 59, 69, 79, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99 (99 has two 9s)
You have a meeting at 3pm. You look at your watch and it shows 2:52pm but your watch runs 4 minutes fast. How many minutes do you actually have until the meeting?
real time is 2:48pm, so you have exactly 12 minutes