ICSE − Q & A

another doubt is while computing matrix sums say A  is some matrix 
and we get A^2+5I= null matrix, in the conclusion should we write 
A^2+5I=0(just zero) or as 0 0 (a null matrix)
                                          0 0

+ 2 more questions by vinuthnr  

while solving inequations and other sort of equation, should we show arrows to show transfer of elements from one side to another
asked by vinuthnr 7 years ago
1

one question please do answer, in sums of trigonometry such as find dis. btw 2 ships when height of cliff is given and the angle facing the cliff is given as 32.20 degree then to find the base we need to divide the h of cliff by tan 32.20 so instead can we consider the consider the complementary angle so only we would have to multiply the h you may ask me to use cot instead but i don't think so cot values are given in the clarke's book
asked by vinuthnr 7 years ago
1

Guys I think that the paper this year would be comparatively tougher than the other years there are two reasons - 1) the science papers and other papers were too easy and 2) they've given a 10 day holiday I mean which board does that??? They would have thought since maths is the toughest paper this year lets give it a 10 day holiday in revised time table how many of you agree w me?? Or you think the paper would be as easy as other years ??( lemme know why?)

In banking, 
1)For eg., should 565 be rounded off to 560 or 570?
2) When we get the interest ( final and.) should we remove the decimal part??

Guys instead of improving my performance is  impairing guys please share some tips to overcome this.
From 78 to 72.5.

Is it important to write the steps for construction question??

http://www.respaper.com/icse_prelims/358/876/3594-pdf.html Q1(c)
is 40.50 decrease correct?

If A={x:-1<x<7,x belongs to R} and B={x:1<x<5,x belongs to I},
If hey ask us to plot A intersection B' then wont it include all real no.s between the integers 2 and 4(which belong to B)?How do we plot it then on the no. line?

http://www.respaper.com/padmanabh30/9936-pdf.html in q.10b will the month of april have zero balance??

How do we round off numbers to significant figures?Especially if a number contains 0.
Please explain with examples.
Thanks in advance

Selina Revision paper 4
Q  1)b...
$olution plz