Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

The ages of a father and son add up to 66.
The father's age is the son's age reversed.
How old could they be?
(3 possible solutions).

13 decks of cards have been mixed. What is the minimum number of cards that must be taken out from the above-mixed cards to guarantee at least one 'four of a kind?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

John leaves home and then he takes three right turns. John wants to return to home but he was scared of Jacob, who is wearing a mask.

What is John Situation ?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

A man has to get a fox, a chicken, and a sack of corn across a river.

He has a rowboat, and it can only carry him and one other thing.
If the fox and the chicken are left together, the fox will eat the chicken.
If the chicken and the corn are left together, the chicken will eat the corn.

How does the man do it?

The answer I give is yes, but what I mean is no. What was the question?

An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?