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Primary 6 Problem Sums/Word Problems - Try FREE

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The figures shown here are made up of matchsticks. When the shape of a triangle is formed, a marble will be placed in the middle of it.

(a)How many triangles are there in the 4th pattern?
(b)How many matchsticks were used to make the 4th pattern?
(c)How many matchsticks are needed to assemble the 101st pattern?
(d)If there are 165 matchsticks arranged to form a certain pattern, how many marbles will be needed?
Notes to students:
  1. If the question above has parts, (e.g. (a) and (b)), given that the answer for part (a) is 10 and the answer for part (b) is 12, give your answer as:10,12
The correct answer is : 16,30,15453,100