![Placeholder: several colourful numbers](/themes/nrich/images/nrich_small_placeholder.png)
Integration
![Placeholder: several colourful numbers](/themes/nrich/images/nrich_small_placeholder.png)
![Calculus Countdown](/sites/default/files/styles/medium/public/thumbnails/content-id-6552-icon.jpg?itok=JRpcMv-r)
problem
Calculus Countdown
Can you hit the target functions using a set of input functions and a little calculus and algebra?
![Operating machines](/sites/default/files/styles/medium/public/thumbnails/content-id-6502-icon.jpg?itok=UEH3f-oF)
problem
Operating machines
What functions can you make using the function machines RECIPROCAL and PRODUCT and the operator machines DIFF and INT?
![Normal intersection](/sites/default/files/styles/medium/public/thumbnails/content-id-6484-icon.png?itok=6oK4rUSZ)
![Integration matcher](/sites/default/files/styles/medium/public/thumbnails/content-id-6412-icon.jpg?itok=L5Y0haGg)
problem
Integration matcher
Can you match the charts of these functions to the charts of their integrals?
![Mind your \Ps and \Qs](/sites/default/files/styles/medium/public/thumbnails/content-id-6382-icon.jpg?itok=997sV7M5)
problem
Mind your \Ps and \Qs
Sort these mathematical propositions into a series of 8 correct statements.
![Curved square](/sites/default/files/styles/medium/public/thumbnails/content-id-6328-icon.png?itok=ChiCsYs5)
problem
Curved square
Can you find the area of the central part of this shape? Can you do it in more than one way?
![Harmonically](/sites/default/files/styles/medium/public/thumbnails/content-id-6076-icon.jpg?itok=KVfX2NBO)
problem
Harmonically
Is it true that a large integer m can be taken such that: 1 + 1/2 +
1/3 + ... +1/m > 100 ?
![Integral Inequality](/sites/default/files/styles/medium/public/thumbnails/content-id-4935-icon.jpg?itok=8AoqvRND)
![Integral Sandwich](/sites/default/files/styles/medium/public/thumbnails/content-id-4934-icon.jpg?itok=kN7luP2x)