This is level 1: pick prime numbers in the range 1 to 16.
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Your job is to pick the
prime numbered fruit from
the tree by clicking on them
as quickly as possible.
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StartAll the prime numbers have not been picked yet. Keep trying.
You have tried to pick a numbered fruit that is not prime.
Try to remember that is not prime.
Try Again


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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 23 September 'Starter of the Day' page by Judy, Chatsmore CHS: "This triangle starter is excellent. I have used it with all of my ks3 and ks4 classes and they are all totally focused when counting the triangles." 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." 
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Level 1  Pick prime numbers in the range 1 to 16
Level 2  Pick prime numbers in the range 17 to 37
Level 3  Pick prime numbers in the range 38 to 61
Level 4  Pick prime numbers in the range 62 to 99
Level 5  Identify numbers as being either prime or composite up to 144
More on this topic including lesson Starters, visual aids, investigations and selfmarking exercises.
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Currently the fastest time in the last month for this level (Level 1) has been achieved by Ironjanson with a time of 0:03 (that is 3 seconds) on Tuesday, January 30, 2024. Can you beat that? If you can make sure you claim a trophy because that is how fast times are officially recognised.
Ironjanson
0:03
Chris Smith @aap03102 Twitter,
Monday, September 16, 2019
"Youâ€™ve met the first six primes:
2,3,5,7,13,11
They form a nice calculation:
23x57=1311."
Stephanie Cardillo, Campbelltown PS
Thursday, November 28, 2019
""
Crosthwaite School, Twitter
Tuesday, November 29, 2022