What does this below rebus puzzle mean?

Can you replace the question mark with the correct number in the below table sequence?

Can you name an animal whose killing cannot be performed without spilling your own blood?

Find the missing letter in the last circle logically in the given below picture.

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

What is 3/7 chicken, 2/3 cat and 2/4 goat?

Which of the below owl is odd one out?

who is silent in the parliament?

What does this rebus mean?

O
N
C
E
TIME

Can anyone tell me a word in the English dictionary which has a silent 'z'?