# Resources tagged with: Estimating and approximating

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### There are 29 results

Broad Topics > Calculations and Numerical Methods > Estimating and approximating

### Time to Evolve

##### Age 14 to 16 Challenge Level:

How many generations would link an evolutionist to a very distant ancestor?

### 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.

### 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 Biology

##### Age 14 to 16 Challenge Level:

Work with numbers big and small to estimate and calulate various quantities in biological contexts.

### More or Less?

##### Age 14 to 16 Challenge Level:

Are these estimates of physical quantities accurate?

### 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?

### Big and Small Numbers in Physics

##### Age 14 to 16 Challenge Level:

Work out the numerical values for these physical quantities.

### Big and Small Numbers in Chemistry

##### Age 14 to 16 Challenge Level:

Get some practice using big and small numbers in chemistry.

### 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?

### Approximately Certain

##### Age 14 to 18 Challenge Level:

Estimate these curious quantities sufficiently accurately that you can rank them in order of size

### Olympic Measures

##### Age 11 to 14 Challenge Level:

These Olympic quantities have been jumbled up! Can you put them back together again?

### 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?

### 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?

##### 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?

### 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.

### 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?

### Thousands and Millions

##### Age 11 to 14 Challenge Level:

Here's a chance to work with large numbers...

### 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?

### 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. . . .

### Almost One

##### Age 11 to 14 Challenge Level:

Choose some fractions and add them together. Can you get close to 1?

### Whole Numbers Only

##### Age 11 to 14 Short Challenge Level:

Can you work out how many of each kind of pencil this student bought?

### Countdown

##### Age 7 to 14 Challenge Level:

Here is a chance to play a version of the classic Countdown Game.

##### 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?

### 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...

### 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.

### 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 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.