Question

plz help me
dont write any unwanted answers
Question 1:
Rajeev added two more triangles in the circle and numbered these as triangle 10 and triangle 11.In this round, Rajeev started counting with triangle numbered as 1, but anticlockwise, and
eliminated every fifth triangle, until only one triangle remained. Which triangle will be left in theend?
Triangle no.-
a) 4
b) 2
c) 8
d) 5
Question 2:
If there are 9 triangles, will the perimeters of the triangles follow any pattern? If so, write thepattern?

Question 3:
The area of an equilateral triangle is found using √3/4(side)²
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Answer 1

Answer:

1.a.4

2. √3/4,√3,9√3/4................

3. yes

Answer 2

Answer:

1. 2
2. 3,6,9,12, and so on
3. yes