ICSE − Q & A

While fimding d mean, if d class interval is given less than something, for eg-less than 10, less than20, then do we take it to be 1-10 or 1-9??

Tan 2A = cot(A-18). Where 2A is an acute angle. Find A. Was this stupid?

Why is it wrong to draw an ogive using a scale(I mean u do get the r8 answer using a scale r8)?

Prove : Quadrilateral formed by angle bisectors of cyclic quad. is also cyclic. Plz Help....:-)

http://www.respaper.com/shivansh2017/6082-pdf.html You will find notes for maths here. Very helpful indeed.
*I don't own anything.*

http://www.respaper.com/hhhhhhhp/4624-pdf.html# question 11 b
is the number of students given frequency or cumulative frequescive ?
according to me it should be cumulative because marks less than is given 
please confirm

http://www.respaper.com/king991999/7172-pdf.html Q4 b

Rakesh had an opening balance of Rs.  9400 on 1st april 2001. compute the interest payable at the end of the year at the rate of 0.5% per month.
does end of the year refer to the financial year or dec 31??.... however the last balance is of december 20

Is chord properties of circle in syllabus ?

http://www.respaper.com/adilahmed986/9698-pdf.html Q6 b with steps pls!!!