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

Student Answer Form – Blackline Master

Flip t

he T

rian

gle

Can

you

turn

this

triang

le u

psid

e do

wn

by m

oving

only t

hree

of

the

coins?

D

raw

your

sol

utio

n on

abo

ve a

nd

writ

e yo

ur n

ame

belo

w

Flip t

he T

rian

gle

Can

you

turn

this

triang

le u

psid

e do

wn

by m

oving

only t

hree

of

the

coins?

D

raw

your

sol

utio

n on

abo

ve a

nd

writ

e yo

ur n

ame

belo

w

Flip t

he T

rian

gle

Can

you

turn

this

triang

le u

psid

e do

wn

by m

oving

only t

hree

of

the

coins?

D

raw

your

sol

utio

n on

abo

ve a

nd

writ

e yo

ur n

ame

belo

w

Flip t

he T

rian

gle

Can

you

turn

this

triang

le u

psid

e do

wn

by m

oving

only t

hree

of

the

coins?

D

raw

your

sol

utio

n on

abo

ve a

nd

writ

e yo

ur n

ame

belo

w

Flip t

he T

rian

gle

Can

you

turn

this

triang

le u

psid

e do

wn

by m

oving

only t

hree

of

the

coins?

D

raw

your

sol

utio

n on

abo

ve a

nd

writ

e yo

ur n

ame

belo

w

Flip t

he T

rian

gle

Can

you

turn

this

triang

le u

psid

e do

wn

by m

oving

only t

hree

of

the

coins?

D

raw

your

sol

utio

n on

abo

ve a

nd

writ

e yo

ur n

ame

belo

w

Conundrum 15 – Manhole Covers | Page 2

© 2005 Ruben Meerman | ABC Science Online