##
Let a and b be two positive integers such that a = p
^{
3
}
q
^{
4
}
and b = p
^{
2
}
q
^{
3
}
, where p and q are prime numbers. If HCF(a,b) = p
^{
m
}
q
^{
n
}
and

##
LCM(a,b) = p
^{
r
}
q
^{
s
}
, then (m + n)(r + s) =

## (a) 15 (b) 30 (c) 35 (d) 72

This question is similar to Question 7 - CBSE Class 10 Sample Paper for 2018 Boards

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