Find the next number in the sequence

1, 2, 6, 21, 88, __?

Replace the (?) with the correct mathematical signs to make the expression equal to 59.

18 ? 12 ? 4 ? 5 = 59

Can you find the thief by just looking at the picture below?

In a guessing game, five friends had to guess the exact numbers of apples in a covered basket.
Friends guessed 22, 24, 29, 33, and 38, but none of the guesses was correct. The guesses were off by 1, 8, 6, 3, and 8 (in random order).

Can you determine the number of apples in a basket from this information?

I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

Can it be possible to build a house that has all its four walls facing towards the South?

There is a brick of gold and a brick of iron in a boat (both 10-inch blocks), if they are both dropped into the water which will make the water level higher?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

The more of this there is, the less you see. What is it?

A man dies of old age on his 25 birthday. How is this possible?