How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

I can be cracked, made, told, and played. What am I?

John can place six large boxes or nine small boxes into a carton.

Can you find out in how many cartons can he place sixty-six boxes in total?

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.

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?

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

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?

Can you find out the remainder when 3^300 is divided by 5?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

How old is your son? asked a man to his neighbour. My son is five times as old as my daughter and my wife is five times as old as my son. I am twice as old as my wife whereas my grandmother, who is celebrating her eighty-first birthday is as old as all of us put together.

How old is the man's son ?