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Mr Balls' Math Laboratory
Thursday, November 8, 2018
EKC Hallam Triplet Sequence
Is it the first term times 16 minus the last? Cf
Quora
That would suggest the answer is -44, and so e.
===
Seth Wax
suggested this better answer
The second number in each triple is the sum of the cubes of the first and the third.
4
3
+
1
3
=
64
+
1
=
65
4
3
+
1
3
=
64
+
1
=
65
2
3
+
3
3
=
8
+
27
=
35
2
3
+
3
3
=
8
+
27
=
35
(
−
3
)
3
+
4
3
=
−
27
+
64
=
37
Answer is C
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