Second row, third clock. Take a close look at the numbers around the face. In the second row, third clock, the number at the top is an 11 instead of the usual 12. This small printing difference makes it the odd one out.

10. Follow the standard order of operations: multiply first, then add. Since five multiplied by zero equals zero, the expression becomes 5 + 0 + 5, which equals 10. Adding first would lead to the wrong answer.

16 hedgehogs. Four hedgehogs appear in each of four rows. A few are curled into balls, and others face different directions, but every animal counts once. Four rows of four equal sixteen.

A needle. The tiny hole through which thread passes in a sewing needle is called its eye. Even though it has an ‘eye,’ a needle cannot see. The riddle relies on two meanings of the same word.

Third row, second from the left. Most clothespins have a tapered wooden tip at the right. The second clothespin in the bottom row instead has a more squared-off end. Scan from left to right and compare the shapes to find the diffe

19 ladybugs. Count the ladybugs from left to right in each row. The rows contain five, five, four and five. Some have their wings spread, but each still counts as one ladybug. The total is nineteen.