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Priya writes the number 1881 on a card. She rotates the card by 180° and reads it again.
Does the number read the same after the 180° turn? (Treat the digits 1 and 8 as having half-turn symmetry.)

Class 7Rotational SymmetryGeometry
  • AYes, it still reads 1881
  • BNo, it reads 8118
  • CNo, it reads 1818
  • DYes, but it reads 8881

Step-by-Step Solution

1 and 8 each look the same upside down, and 1881 reversed is 1881, so after a 180° turn it still reads 1881.
Answer: A) Yes, it still reads 1881

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