Mr. Buttons was all set to go to the village of Buttonland to meet his friend. So, he packed his bags and left for the village at 5 in the morning. Upon travelling on a road for miles, he came across a point where the road diverged into two. He was confused on which road to take. He gazed around and he saw two owls sitting on a branch. He thought he could ask for directions for the village from the two owls. So he went to the tree. There he saw a sign which read, "One owl always lies, and one is always truthful. They both fly away if you ask them more than 1 question."
Mr. Buttons was caught in the dilemma of what to ask? And from which owl to ask, since he only had one question. What should Mr. Buttons ask?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Find the next number in the series below

21 32 54 87 131 ?

Count the number of times the letter "F" appears in the following paragraph:

FAY FRIED FIFTY POUNDS OF
SALTED FISH AND THREE POUNDS
OF DRY FENNEL FOR DINNER FOR
FORTY MEMBERS OF HER FATHER'S FAMILY.

Why is the Hole below a Lock?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

What occurs twice in a week, once in a year but never in a day?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

How do you go from 98 to 720 using just one letter?

Prove that the below maths equation is true.

8 + 8 = 91