In a class of $60$ students, where girls are twice the number of boys, Kamal ranked $17^{th}$ from the top. If there are $9$ girls ahead of Kamal, how many boys are after him in rank?

In a class of $10$ girls and $20$ boys,Jaya's rank is $4$ among the girls and $18$ in the class. What is Jaya's rank among the boys in the class?

Raman ranks sixteenth from the top and forty-ninth from the bottom in a class. How many students are there in the class?

Among five friends,Mahesh is taller than Karan but not Yash. Hrithik is taller than Yash but not Abhishek. If they stand in increasing order of their heights,who will be first in line?

$M$ is older than $R$. $Q$ is younger than $R$ and $N$. $N$ is not as old as $M$. Who among $M, N, R$,and $Q$ is the oldest?

In the following series,how many such odd numbers are there which are divisible by $3$ or $5$,followed by an odd number,and then followed by an even number?
$12, 19, 21, 3, 25, 18, 35, 20, 22, 21, 45, 46, 47, 48, 9, 50, 52, 54, 55, 56$