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2014 Math Kangaroo

Problem 5

Problem 5 · 2014 Math Kangaroo Easy
Spatial & Visual Reasoning path-tracingsequence-of-figures

Christopher worked out the sums written next to the dots and got the answers 0, 1, 2, 3, 4 and 5. He joined the dots in order, starting at the dot with answer 0 and finishing at the dot with answer 5. Which shape was he left with? (Choose the matching picture.)

Figure for Math Kangaroo 2014 Problem 5
Show answer
Answer: A
Show hints
Hint 1 of 3
First work out the little sum next to each dot and write its answer on the dot.
Still stuck? Show hint 2 →
Hint 2 of 3
Now you have dots labelled 0, 1, 2, 3, 4 and 5.
Still stuck? Show hint 3 →
Hint 3 of 3
Draw a line from 0 to 1 to 2 and on to 5, then see which picture your line looks like.
Show solution
Approach: label each dot with its answer, then join them in order
  1. Work out each sum and write the answer on its dot, so the dots are now numbered 0, 1, 2, 3, 4 and 5.
  2. Start your pencil at the 0 dot and draw to the 1 dot, then the 2, and so on up to the 5.
  3. The line zig-zags from side to side and makes a clear shape.
  4. That shape is picture A.
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