RRB Paramedical Staff Nurse Model Paper 8

Here, the HCF = 33
Then, let the two numbers be 33a and 33b respectively
Where a and b are coprime.
Then, $33\mathit{a}+33\mathit{b}=528$
$\Rightarrow \mathit{a}+\mathit{b}=16$
Hence, values of (a, b) which are coprime to each other can be
(1, 15), (3, 13), (5, 11) and (7, 9)
Hence, required number of pairs is 4.