10 points are chosen on a plane. Every possible pair of
points is joined by a line and the midpoint of the line is
marked with red colour. What is the minimum possible number
points on the plane which have been marked with red colour?

three circles with same radius r are drawn with centres as
three vertices of a triangle.what is the sum of areas of the
intersections of these circles with the triangle

if 8men works 8hrs per day for 8days get rs.45,then how many
men required if the work is 5hrs per day for 10days they get
rs.60?(want solution with steps)

you r given with 50 tigers.how will you place those 50
tigers in a room.....you can place any no. of tigers in a
room but the number of tigers u place must be an odd number?

Use Venn diagrams to answer each of the following
questions. You must show your Venn diagram for each
problem. 1. A survey of 80 sophomores at a certain
western college showed the following:
36 take English ,32 take history
32 take political science
16 take history and English
16 take political science and history ,14 take political
science and English
6 take all three
How many students:
a) take English and neither of the
other two? ____________
b) Take none of the three
courses? ____________
c) take history, but neither of
the other two? ____________
d) take political science and history but not English?
____________
e) do not take political science?

Thirty men take 20 days to complete a job working 9 hours a
day. How many hour a day should 40 men work to complete the job?
(a) 8 hrs
(b) 7 1/2 hrs
(c) 7 hrs
(d) 9 hrs

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