Find the missing term for the given series from the given alternatives:
$QPO, SRQ, UTS, WVU, (?)$

The positions of how many digits in the number $7,3,5,4,6,1,2$ will remain unchanged after the digits within the number are rearranged in descending order from left to right?

Fill in the blank space for the given series with the correct alternative.
$34, 18, 10, 6, 4, (...)$

These questions are based on the following letter/number/symbol arrangement. Study it carefully and answer the questions that follow.

$5, D,H,E, \star, 7,9, \$ ,F,I ,6 ,R ,\% ,L ,1 ,A,J, 3, B, \# ,4 ,@ ,K,P ,8, U,M, 2$

What will come in place of the question marks $(?)$ in the following series based on the above arrangement?

$E,D,H ,9 ,\star, 7, I,\$,F, ?, ?, ?$

These questions are based on the following arrangement. Study it carefully and answer the questions.

$8 ,H ,\% ,3,7 ,T,A ,4 ,\# ,6 ,B,I ,@ ,R ,1 ,Q ,\star, L,E ,2 ,K ,\$ ,U ,5,9$

What will come in place of the question mark in the following series based on the above arrangement?

$7T3,4\#A,BI6,?$

In the series $7, 14, 28, \ldots$,what will be the $10^{th}$ term?