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HARDEST MATH PAPER IN THE HISTORY OF IGCSE 0580 MATH 42 DISCUSSION

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About the last question, n was equal to 19. If it was 20, then 20 x 18.4 would be 368 and it would overlap. Dividing 360 by 18.4 would be 19,5, so 19 is the answer.
yes youre right if it were 20 triangles it'd surely overlap i absolutely agree with you...but when you come to the 19th triangle, youll notice that its (n-1) not n, so n = 19+1 = 20
 
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what was your answer of the same question part 2...in which we had to answer in square root a/b
 
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