Across
- 1. 225 can be written as the sum of first 15 ____numbers.
- 3. the difference between the squares of two consecutive natural numbers is equal to the ____of those numbers.
- 5. product of a rational number and its multiplicative inverse.
- 8. multiplicative identity
- 9. square of a negative number
- 11. additive identity for rational numbers.
- 12. the number of zeros at the end of a perfect square is always _____.
Down
- 2. rational numbers are not closed under it.
- 4. repeated multiplication of a number by itself can be shown by _______
- 6. square of an even number
- 7. number of digits in square root of 92416.
- 8. a rational number is said to be negative if its numerator and denominator have _____signs.
- 10. square of a proper fraction is _______than the fraction.