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A bat and a ball cost $1.10 together. The bat costs $1.00 more than the ball. How much is the ball?
Logic puzzles, riddles and number sequences, one per day of the month. They're short enough to solve in line for coffee and tricky enough that you'll want to send one to a friend.
Each event puts the answer below a gap so you can try first. The set repeats monthly, which is handy: next month you can check whether you still remember the trick.
One tap adds it to Apple Calendar, Google or Outlook. It updates itself and you can remove it any time.
Free on the App Store · iPhone