Today’s Challenge
Try the following MATHELONA challenge, just like the ones in my number puzzle pocket book. Further details can be found by clicking on MATHELONA.
Your task is to make all three lines work out arithmetically by replacing the 12 ◯’s below with 0 0 1 1 2 2 3 3 4 4 6 6. Can you do it?
◯ + ◯ = 4 = ◯ – ◯
◯ + ◯ = 6 = ◯ × ◯
◯ + ◯ = 3 = ◯ ÷ ◯
The 7puzzle Challenge
The playing board of the 7puzzle game is a 7-by-7 grid containing 49 different numbers, ranging from 2 up to 84.
The 5th & 6th rows of the playing board contain the following fourteen numbers:
5 6 7 12 16 18 20 21 33 49 50 56 81 84
What is the answer when the bigger multiple of 10 is divided by the smaller one?
Make 223 Challenge
Can you arrive at 223 by inserting 1, 3, 5 and 7 into the gaps below?
(3+◯)×◯×◯²–◯³ = 223
Answers can be found here.
Click Paul Godding for details of online math tuition. Wherever you are in the world, please get in touch.
