Other tags that relate to Mathland Election
Fractions. Addition & subtraction. Combinatorics. Percentages. Games. Place value. Pythagoras' theorem. Comparing and ordering numbers. Mental calculation strategies. Estimating and approximating.There are 29 results
Broad Topics > Calculations and Numerical Methods > Estimating and approximating
Dicey Operations
Age 11 to 14
Challenge Level
Who said that adding, subtracting, multiplying and dividing couldn't be fun?
Nice or Nasty for Two
Age 7 to 14
Challenge Level
Some Games That May Be Nice or Nasty for an adult and child. Use your knowledge of place value to beat your opponent.
Can You Make 100?
Age 11 to 14
Challenge Level
How many ways can you find to put in operation signs (+ - x รท) to make 100?
Nice or Nasty
Age 7 to 14
Challenge Level
There are nasty versions of this dice game but we'll start with the nice ones...
Countdown
Age 7 to 14
Challenge Level
Here is a chance to play a version of the classic Countdown Game.
Whole Numbers Only
Age 11 to 14 Short
Challenge Level
Can you work out how many of each kind of pencil this student bought?
Counting Sweets
Age 7 to 14
Challenge Level
How might you use mathematics to improve your chances of guessing the number of sweets in a jar?
Power Countdown
Age 14 to 16
Challenge Level
In this twist on the well-known Countdown numbers game, use your knowledge of Powers and Roots to make a target.
Almost One
Age 11 to 14
Challenge Level
Choose some fractions and add them together. Can you get close to 1?
Ladder and Cube
Age 14 to 16
Challenge Level
A 1 metre cube has one face on the ground and one face against a wall. A 4 metre ladder leans against the wall and just touches the cube. How high is the top of the ladder above the ground?
Squaring the Circle
Age 11 to 14
Challenge Level
Bluey-green, white and transparent squares with a few odd bits of shapes around the perimeter. But, how many squares are there of each type in the complete circle? Study the picture and make. . . .
A Jar of Teddies
Age 7 to 14
Challenge Level
How many teddies are in the jar? How many teddies could you fit in your classroom?
The Fastest Cyclist
Age 14 to 16
Challenge Level
Andy is desperate to reach John o'Groats first. Can you devise a winning race plan?
Place Your Orders
Age 11 to 14
Challenge Level
Can you rank these sets of quantities in order, from smallest to largest? Can you provide convincing evidence for your rankings?
Big and Small Numbers in Chemistry
Age 14 to 16
Challenge Level
Get some practice using big and small numbers in chemistry.
Biology Measurement Challenge
Age 14 to 16
Challenge Level
Analyse these beautiful biological images and attempt to rank them in size order.
Does This Sound about Right?
Age 11 to 14
Challenge Level
Examine these estimates. Do they sound about right?
Speed-time Problems at the Olympics
Age 14 to 16
Challenge Level
Have you ever wondered what it would be like to race against Usain Bolt?
A Question of Scale
Age 14 to 16
Challenge Level
Use your skill and knowledge to place various scientific lengths in order of size. Can you judge the length of objects with sizes ranging from 1 Angstrom to 1 million km with no wrong attempts?
Big and Small Numbers in Physics
Age 14 to 16
Challenge Level
Work out the numerical values for these physical quantities.
Back Fitter
Age 14 to 18
Challenge Level
10 graphs of experimental data are given. Can you use a spreadsheet to find algebraic graphs which match them closely, and thus discover the formulae most likely to govern the underlying processes?
All in a Jumble
Age 11 to 14
Challenge Level
My measurements have got all jumbled up! Swap them around and see if you can find a combination where every measurement is valid.
Approximately Certain
Age 14 to 18
Challenge Level
Estimate these curious quantities sufficiently accurately that you can rank them in order of size
Time to Evolve
Age 14 to 16
Challenge Level
How many generations would link an evolutionist to a very distant ancestor?
Big and Small Numbers in Biology
Age 14 to 16
Challenge Level
Work with numbers big and small to estimate and calulate various quantities in biological contexts.
Where Am I?
Age 11 to 16
Challenge Level
From the information you are asked to work out where the picture was taken. Is there too much information? How accurate can your answer be?
Olympic Measures
Age 11 to 14
Challenge Level
These Olympic quantities have been jumbled up! Can you put them back together again?
NRICH is part of the family of activities in the Millennium Mathematics Project.