Explanation:
For Arithmetic Sequence
Tn = a + (n -- 1)d
Where Tn = the no of nth term
a = First number
n = nth term
d = common difference
a = --27, T2 = --21
d = second term -- first term
d = --27 -- (--21)
d = --27 + 21 = --6
a = --27, n = 62, d = --6, T62 = ?
Tn = a + (n -- 1)d
T62 = --27 + (62 -- 1)×--6
T62 = --27 + (61 × --6)
T62 = --27 + (--366)
T62 = --27 -- 366
T62 = --393