Question

3:243::5:3125-how


which one does not belong to the group
a-63
b-65
c-84
d-91​

Answer 1

3:243::5:3125-how

$\bold\red{solution}$

(3)5=243(3)5=243 ∴(5)5=3125 from Corsican

which one does not belong to the group

$\huge{\underline{\mathfrak{Solution:-}}}$

d-91

Answer 2

The pattern followed is,

53, 83 and 73 are prime numbers.

Whereas, '63' is not a prime member.

Hence, "63" does not belong to the group.