Maths Crossword

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Across
  1. 2. in which number system,there is no symbol for 0
  2. 3. The golden ratio is equivalent to 1.618… is denoted by a symbol Φ. What is the origin of this symbol?
  3. 5. A compound statement of the form " if p then q " is called an
  4. 7. All counting numbers, together with their negatives and zeros constitute is set of -
  5. 8. which is the largest known number in the world?
Down
  1. 1. All natural numbers are whole numbers. However, not all whole numbers can be considered natural – True or False?
  2. 4. half of diameter
  3. 6. An object is thrown into the air. After a while, it falls back to the Earth. The flight path of the object traces what shape?