Another number sequence
Posted: Thu Sep 25, 2014 10:02 pm
What is the missing number in this sequence ?
1, 4, 8, 9
2, 3, 6, 7
3, 4, 12, 13
2, 6, 9, ?
Spoilerific Hint:
Pythagoras' Theorem in 3D.
All square, so far.
1, 4, 8, 9
2, 3, 6, 7
3, 4, 12, 13
2, 6, 9, ?
Spoilerific Hint:
Pythagoras' Theorem in 3D.
All square, so far.