This riddle has been around for some time on internet platforms such as Instagram, Facebook, and WhatsApp, and many people still argue over what the answer might be, as there are many possibilities. The correct answer is A half dollar, a quarter, and four dimes. You obviously can’t have any pennies, because you couldn’t have 1-4 pennies, since $1.15 is a multiple of 5, and if you had 5 pennies or more you could change a nickel. You can’t have more than 1 nickel, otherwise you could change a dime. And if you had 1 nickel you couldn’t have but 1 dime, otherwise you could change a quarter. Then if you had 1 nickel and 1 dime you’d have 15 cents. That would leave $1.00 and you couldn’t make that remaining $1.00 with quarters and halves without either being able to change a half or a dollar. So you can’t have any pennies or nickels. Since you can’t have any pennies or nickels, you can’t possibly make $1.15 with dimes and halves only, so you must have at least 1 quarter. You can’t have more that one quarter, otherwise you could change a half. So you must have exactly 1 quarter. That leaves 90 cents, to make with a half dollar and dimes. So that’s 1 half and 4 dimes. And with only 4 dimes you can’t change a half dollar.