CMAT Arrangements Questions

In a row of boys facing the north, A is $$16^{th}$$ from the left and C is $$16^{th}$$ from the right end. B who is $$4^{th}$$ to the right of A, is $$5^{th}$$ to the left of C in the row. How many boys are there in the row ?

A, B, C, D, E, F, G, H and J are sitting around a circle facing the centre. C is third to the left of A. E is fourth to the right of A. D is fourth to the left of J, who is second to the right of A. F is third to the right of B. G is not an immediate neighbour of A. What is the H's position with respect to E?

In a row of girl students facing north, Radhika is $$10^{th}$$ to the left of Purnima who is $$21^{st}$$ from the right end. If Monika who is $$17^{th}$$ from the left end is $$4^{th}$$ to the right of Radhika, how many students are there in the row?