Maths Questions

12345678
Across
  1. 3. How many numbers can be formed by using 0, 1 and 2 once?
  2. 4. In set A={1234567} how many three digit numbers can be formed if no digit is repeated?
  3. 7. Find the linear function satisfying f(2)=12 and f(-2)=-8.
  4. 8. How many terms are there in the expansion (x-3y)^6?
Down
  1. 1. 2 dice are thrown find the possibility of getting the sum 4.
  2. 2. What is the constant term in the expansion of [x+(1/x^2)]^6?
  3. 5. In how many ways can 4 girls and 3 boys be seated in a row alternately?
  4. 6. In how many ways can 4 people be seated in a row so that a certain two are not together?