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An equilateral triangle BPC is drawn inside a square ABCD .What is the value of the angle APD in degrees?
a)75
b)90
c)120
d)135
e)150

If x and y are even integers ,then the number of solutions of x^2 - Y^2 = 7389746232 is

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What is the difference between linear sequencing and linear arrangements.For eg-If we have to arrange 5 people having different jobs and wearing shirts of different colour,that is a question of linear arrangement,right?But,in case of linear sequencing what do we deal with?Like the Time factor,like who enters the room first ,who leaves last,which train comes in first,which leaves?So,my question is what's the main difference between arrangements and sequencing?Are they too different topics or are they synonymous to each other.Also,is ranking and sequencing one and the same thing?

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Usain and Rudolf are running on a circular track of length 240 m. They start running for 2 different points on the track and run at speeds of u m/s and r m/s respectively. Usian is the faster runner. They meet each other for the first time after a time of 16 s. They meet for the second time 40 s after they start running. If Rudolf had started running in the opposite direction, the two run would have met for the first time after 40 seconds. Find the speed of Usain.

A) 10 B)5 C)7 D)3

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How many isosceles triangles with integral sides are possible with perimeter 12 cm?

A)1
B)2
C)3
D)4