Other tags that relate to Mathland Election
Calculating with ratio & proportion. Percentages. Comparing and Ordering numbers. Addition & subtraction. Interactivities. Mixed fractions, decimals and percentages. Money. Fractions. Calculating with percentages. Games.There are 19 results
Broad Topics > Calculations and Numerical Methods > Estimating and approximating
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.
Dicey Operations
Age 11 to 14 Challenge Level:
Who said that adding, subtracting, multiplying and dividing couldn't be fun?
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.
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?
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?
Whole Numbers Only
Age 11 to 14 Short Challenge Level:
Can you work out how many of each kind of pencil this student bought?
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?
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.
Approximately Certain
Age 14 to 18 Challenge Level:
Estimate these curious quantities sufficiently accurately that you can rank them in order of size
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. . . .
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 Physics
Age 14 to 16 Challenge Level:
Work out the numerical values for these physical quantities.
Does This Sound about Right?
Age 11 to 14 Challenge Level:
Examine these estimates. Do they sound about right?
Biology Measurement Challenge
Age 14 to 16 Challenge Level:
Analyse these beautiful biological images and attempt to rank them in size order.
Big and Small Numbers in Chemistry
Age 14 to 16 Challenge Level:
Get some practice using big and small numbers in chemistry.
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.
Back Fitter
Age 14 to 16 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?
NRICH is part of the family of activities in the Millennium Mathematics Project.