UNBELIEVABLE!
A Hole In One
Well Done!!
Without using a calculator or pen an paper estimate the value of the unknown to satisfy the conditions above. This is a trial and improvement exercises aided by any insights you have for the numbers involved. Type in your estimate then click the 'swing' button. You will be shown the result of putting your estimate into the given expression. Continue to improve your estimate until the expression is in the given range. Though you shouldn't use a calculator or pen and paper for this game you are encouraged to use your mental arithmetic skills to make an informed guestimate. This is a nine hole golf course. When you have played all nine holes you will have the opportunity to claim a Transum Trophy showing your score. You are encouraged to play the game again to improve upon your personal best. You can earn Transum Trophies for hundreds of mathematical activities, quizzes and games. Collect trophies in your own personal Transum Trophy cabinet and, for some activities, you can work on improving your personal best Transum scores. "Estimation is the process of finding an estimate, or approximation, which is a value that is usable for some purpose even if input data may be incomplete, uncertain, or unstable. Typically, estimation involves "using the value of a statistic derived from a sample to estimate the value of a corresponding population parameter"  Wikipedia 
If you enjoyed this you could try 
Score Card



Transum.orgThis web site contains over a thousand free mathematical activities for teachers and pupils. Click here to go to the main page which links to all of the resources available. Please contact me if you have any suggestions or questions. 
More Activities: 

Mathematicians are not the people who find Maths easy; they are the people who enjoy how mystifying, puzzling and hard it is. Are you a mathematician? Comment recorded on the 17 November 'Starter of the Day' page by Amy Thay, Coventry: "Thank you so much for your wonderful site. I have so much material to use in class and inspire me to try something a little different more often. I am going to show my maths department your website and encourage them to use it too. How lovely that you have compiled such a great resource to help teachers and pupils. Comment recorded on the 18 September 'Starter of the Day' page by Mrs. Peacock, Downe House School and Kennet School: "My year 8's absolutely loved the "Separated Twins" starter. I set it as an optional piece of work for my year 11's over a weekend and one girl came up with 3 independant solutions." 
Each month a newsletter is published containing details of the new additions to the Transum website and a new puzzle of the month. The newsletter is then duplicated as a podcast which is available on the major delivery networks. You can listen to the podcast while you are commuting, exercising or relaxing. Transum breaking news is available on Twitter @Transum and if that's not enough there is also a Transum Facebook page. 

Numeracy"Numeracy is a proficiency which is developed mainly in Mathematics but also in other subjects. It is more than an ability to do basic arithmetic. It involves developing confidence and competence with numbers and measures. It requires understanding of the number system, a repertoire of mathematical techniques, and an inclination and ability to solve quantitative or spatial problems in a range of contexts. Numeracy also demands understanding of the ways in which data are gathered by counting and measuring, and presented in graphs, diagrams, charts and tables." Secondary National Strategy, Mathematics at key stage 3 

Go MathsLearning and understanding Mathematics, at every level, requires learner engagement. Mathematics is not a spectator sport. Sometimes traditional teaching fails to actively involve students. One way to address the problem is through the use of interactive activities and this web site provides many of those. The Go Maths main page links to more activities designed for students in upper Secondary/High school.  
Teachers  
If you found this activity useful don't forget to record it in your scheme of work or learning management system. The short URL, ready to be copied and pasted, is as follows: 
Alternatively, if you use Google Classroom, all you have to do is click on the green icon below in order to add this activity to one of your classes. 
It may be worth remembering that if Transum.org should go offline for whatever reason, there are mirror site at Transum.info that contains most of the resources that are available here on Transum.org. When planning to use technology in your lesson always have a plan B! 
Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for those learning Mathematics anywhere in the world. Click here to enter your comments. 
Transum,
Friday, January 29, 2016
"Of all the people who have claimed a trophy for completing the round (all nine holes) the average score for a hole is about nine strokes. The median of the total scores is 60 and the mean is 78."
Aki, Peak School
Monday, April 8, 2019
"This Game got challenging by each level and I got stuck on 5.
It was very hard to estimate the sq Root on level 3."