Multiple choice general knowledge math & puzzles

Last weekend, I went to play in the nearby park. It was real fun! I rode my new bicycle that Mom had gifted me on my birthday. On reaching the park, I saw that there were a total of 9 bicycles and tricycles. If the total number of wheels was 23, how many tricycles were there?

  1. 2

  2. 3

  3. 6

  4. 5
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let b = bicycles (2 wheels each) and t = tricycles (3 wheels each). We have b + t = 9 and 2b + 3t = 23. Solving: substitute b = 9 - t into the second equation to get 18 + t = 23, so t = 5. There were 5 tricycles in the park.

AI explanation

Let bicycles = x, tricycles = y. Total vehicles: x + y = 9. Total wheels: 2x + 3y = 23. Substituting x = 9 − y into the wheel equation: 2(9 − y) + 3y = 23 → 18 − 2y + 3y = 23 → 18 + y = 23 → y = 5. So there were 5 tricycles (and 4 bicycles), which checks out: 4×2 + 5×3 = 8 + 15 = 23. The other options don't satisfy both equations simultaneously.

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