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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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.
Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you donâ€™t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.
Currently the fastest time in the last month for this level (Level 1) has been achieved by S225381 with a time of 0:04 (that is 4 seconds) on Thursday, May 5, 2022. Can you beat that? If you can make sure you claim a trophy because that is how fast times are officially recognised.
S225381
0:04
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
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