2 out of 3
1 out of 3
Prove that k.k! = (k+1)! - k! and sum the series 1.1! + 2.2! + 3.3! +...+n.n!
1 out of 3
Which of these logarithmic challenges can you solve?
3 out of 3
1 out of 3
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?
1 out of 3
A farmer is supplying a mix of seeds, nuts and dried apricots to a manufacturer of crunchy cereal bars. What combination of ingredients costing £5 per kg could he supply?
2 out of 3
How many centimetres of rope will I need to make another mat just like the one I have here?
3 out of 3
Using all ten cards from 0 to 9, rearrange them to make five prime numbers. Can you find any other ways of doing it?
2 out of 3
Can you make five differently sized squares from the interactive tangram pieces?
2 out of 3
This problem invites you to build 3D shapes using two different triangles. Can you make the shapes from the pictures?
