# Monthly Archives: January 2015

# Maths prize: Russian peasant boys (1 December 2015)

The painting above, done in 1895, is of Russian peasant boys doing a mental arithmetic puzzle. As you can see, one of them has the answer and is whispering it into the teacher’s ear. Continue reading

# Protected: Maths prize: skyscrapers

# Protected: Maths prize: Smallest numbers

# Maths prize for 3 November 2015: weighing

You have a scale with two pans, so for example you can measure 2 grams exactly by putting a one-gram weight in one pan and a three-gram weight in the other. With what four weights can you measure any weight up to 40 grams? With what five can you measure any weight up to 121 grams? Continue reading