## Saturday, December 23, 2017

### Numbers : can you make 1 1 1 1 = 5? (Fr Brilliant.org)

Insert +, -, /, *, (), ^, !, or any operator you can think of...
 Quiz of the Week
 Do there exist operations that can be performed to make this equation true? Note: Any operations can be used, so get creative!

## Thursday, December 14, 2017

### P5/P6 Area of triangle/ decagon (brilliet)

Sent from my iPhone

Begin forwarded message:

Date: 14 December 2017 at 2:40:06 PM SGT
To: <changchengliang@gmail.com>
Subject: Chang, orange you glad we send you math puzzles?

In the regular decagon above, find the percentage of area that is shaded orange.
 Problems of the Week December 11 - December 17

In the regular decagon above, find the percentage of area that is shaded orange.

Hint: You can solve this in your head with one quick trick!

 Brilliant, 15 Butte Pl, San Francisco CA 94103 Unsubscribe from receiving Brilliant problems of the week 2-3 times per week (like this one).

## Thursday, November 30, 2017

### there's a quick trick to this geometry puzzle...

What percentage of the square's area is colored blue?
 Problems of the Week November 27 - December 3

## Wednesday, November 29, 2017

### Music and mathematics - Wikipedia

https://en.wikipedia.org/wiki/Music_and_mathematics

Sent from my iPhone

## Monday, November 27, 2017

What is 6! x 7! / 10! ?
 Quiz of the Week

## Monday, November 20, 2017

### Logical thinking: “What will balance this scale?”

At the end of this Exploration, you'll have a thorough toolbox of algebraic techniques that feel natural to use and empower you to master complex problems and puzzles!
 Quiz of the Week

How many green squares should be placed on the right side of the bottom scale in order to make it balance when released?

 Brilliant, 15 Butte Pl, San Francisco CA 94103 Unsubscribe from receiving Brilliant problems of the week 2-3 times per week (like this one).

## Tuesday, November 14, 2017

### Mass, algebra , Logical thinking

Sent from my iPhone

Begin forwarded message:

Date: 13 November 2017 at 1:30:09 PM SGT
To: <changchengliang@gmail.com>
Subject: Chang, can you solve this scale puzzle?

How much does a single red square weigh?
 Quiz of the Week

How much does a single red square weigh?

 Brilliant, 15 Butte Pl, San Francisco CA 94103 Unsubscribe from receiving Brilliant problems of the week 2-3 times per week (like this one).