1.a new sequence is obtained from the sequence of the positive integers(1,2,3....) by deleting all the  perfect squares.then find the 2003 term of the new sequence.

2.how many of the triangles whose verteces re chosen from the vertces of a rectangular block are acute.

a.0

b.6

c.8

d.24

 

3.If the 4th and the 13th term of a sequence(a+b)ⁿ is equal then find n.

4.the circle x²+y² =4 cuts the circle x² + y² +2x+3y-5 inA and B.then find the equation of the circle on AB as diameter.