Conundrum 16
Flip the Triangle
Can you turn this triangle upside down
by moving only three of the coins?
Suggestion for illustrating the “Coin Triangle” conundrum
Solution
An additional coin puzzle:
What is the minimum number of coins you can move
to change this triangle into a square?
Upside down solution:
Conundrum 15 – Manhole Covers | Page 1
© 2005 Ruben Meerman | ABC Science Online
Draw your solution on above and
write your name below
Flip the Triangle
Can you turn this triangle upside down
by moving only three of the coins?
Draw your solution on above and
write your name below
Flip the Triangle
Can you turn this triangle upside down
by moving only three of the coins?
Draw your solution on above and
write your name below
Can you turn this triangle upside down
by moving only three of the coins?
Can you turn this triangle upside down
by moving only three of the coins?
Draw your solution on above and
write your name below
Flip the Triangle
Flip the Triangle
Draw your solution on above and
write your name below
Can you turn this triangle upside down
by moving only three of the coins?
Flip the Triangle
Draw your solution on above and
write your name below
Can you turn this triangle upside down
by moving only three of the coins?
Flip the Triangle
Student Answer Form – Blackline Master
Conundrum 15 – Manhole Covers | Page 2
© 2005 Ruben Meerman | ABC Science Online