Continuing from the previous episode …
Months later, in a tension-filled room …
This is the information they managed to extract from the Maths Tutor’s feisty aunty, before they got chased off by her reinforcement aunties via an intense attack of umbrellas, shoes, handbags etc. …
For some superstitious reason, the Maths Tutor had chosen The Temple to be located at a postal code based on a sequence with its first five terms T1, T2, T3, T4, T5 as follows:
T1 = 1 = 1
T2 = 3 = 1 + 2
T3 = 6 = 1 + 2 + 3
T4 = 10 = 1 + 2 + 3 + 4
T5 = 15 = 1 + 2 + 3 + 4 + 5
The nth term in the sequence is given by
Find T350 and hence find The Temple‘s postal code which is the solution of
5 + 10 + 15 + … + 1750.
Even though most of them failed their PSLE math, this should really, really be a simple one.