Search

Alphabet Blocks
problem

Alphabet Blocks

5 to 11
filled star empty star empty star
These alphabet bricks are painted in a special way. A is on one brick, B on two bricks, and so on. How many bricks will be painted by the time they have got to other letters of the alphabet?
Stirling work
problem

Stirling Work

16 to 18
filled star filled star empty star
See how enormously large quantities can cancel out to give a good approximation to the factorial function.
Common Remainder
problem

Common Remainder

11 to 14
filled star filled star filled star

144 divided by n leaves a remainder of 11. 220 divided by n also leaves a remainder of 11. What is n?

Sums and Differences 2
problem

Sums and Differences 2

7 to 11
filled star empty star empty star
Find the sum and difference between a pair of two-digit numbers. Now find the sum and difference between the sum and difference! What happens?
X is 5 squares
problem

X Is 5 Squares

7 to 11
filled star filled star empty star
Can you arrange 5 different digits (from 0 - 9) in the cross in the way described?
The Genie in the Jar
problem

The Genie in the Jar

11 to 14
filled star empty star empty star

This jar used to hold perfumed oil. It contained enough oil to fill granid silver bottles. Each bottle held enough to fill ozvik golden goblets and each goblet held enough to fill vaswik crystal spoons. Each day a spoonful was used to perfume the bath of a beautiful princess. For how many days did the whole jar last? The genie's master replied: Five hundred and ninety five days. What three numbers do the genie's words granid, ozvik and vaswik stand for?

Scientific curves
problem

Scientific Curves

16 to 18
filled star filled star filled star

Can you sketch these difficult curves, which have uses in mathematical modelling?

Displaying 1981 - 1990 of 2295