# Brain Teaser Tuesday!

Answer an interesting and fun math problem on this page for the chance to win a $10 Tim's card! Answer before the Friday of that week! Winner will be contacted by email!

## Brain Teaser (Friday, November 30th 2018)

*-Answer before Friday, January 18th-*

You are on your way to visit your Grandma, who lives at the end of the valley. It's her birthday, and you want to give her the cakes you've made.

Between your house and her house, you have to cross 7 bridges, and as it goes in the land of make believe, there is a troll under every bridge! Each troll, quite rightly, insists that you pay a troll toll. Before you can cross their bridge, you have to give them half of the cakes you are carrying, but as they are kind trolls, they each give you back a single cake.

How many cakes do you have to leave home with to make sure that you arrive at Grandma's with exactly 2 cakes?

## Brain Teaser (Tuesday, February 7th)

*-Answer before Friday, February 10th-*

A 5 by 5 square is inscribed in a circle, what is the area of the circle?

## Brain Teaser (Tuesday, January 31st)

*-Answer before Friday, February 3rd-*

How many odd numbers between 100 and 1000 have digits that sum to 10?

## Brain Teaser (Tuesday, January 24th)

*-Answer before Friday, January 27th-*

A student is writing an exam. Part A, true and false, has 7 questions. Part B the student must choose to answer 6 of 8 questions, and part C the student must answer all questions. How many ways are there to complete the exam?

**Answer: 3584**

## Brain Teaser (Tuesday, January 17th)

*-Answer before Friday, January 20th-*

For the following sequence 2, 11, 20, 29, which of the numbers will not be counted?

**Answer: 1039**

## Brain Teaser (Tuesday, November 29th)

-Answer before Friday, December 2nd-

How many triangles are in this picture?

**Answer: 42**

## *SPECIAL EDITION BRAIN TEASER TUESDAY*

Brain Teaser(s) (Tuesday, November 22nd)

-Answer before Friday, November 25th-

This is a special edition of Brain Teaser Tuesday. This week only, there will be 2 QUESTIONS! An easy question and a hard question. WE WILL GIVE AWAY A $10 TIM'S CARD FOR EACH QUESTION!

Chances are, you will be more likely to win a $10 Tim's Card if you answer the hard question correctly!

** Easy question:** The digits 1 to 6 are rearranged into two 3 digit numbers (each digit is used only once). Then, the two acquired 3 digit numbers are added. The largest sum that can result is...

** Hard question: **If all dips are dops and some dups are dips, which of the following statements A, B, C

*must*be true?

A: All dips are dups.

B: Some dops are dups.

C: Some dips are not dops.

*Answer to easy question: 1173Answer to hard question: B Only*

## Brain Teaser (Tuesday, November 15th)

-Answer before Friday, November 18th-

How many prime numbers are there between 10-30?

*Answer: 6*

## Brain Teaser (Tuesday, November 8th)

-Answer before Friday, November 11th-

What's the perimeter?

*Answer: 3pi + 14*

## Brain Teaser (Tuesday, November 1st)

-Answer before Friday, November 4th-

How many square metres are equal to 5 square kilometers?*Answer: 5 000 000*

## Brain Teaser (Tuesday, October 25th)

-Answer before Friday, October 28th-

What is the area of the shaded region?*Answer: 38.5*

## Brain Teaser (Tuesday, October 18th)

-Answer before Friday, October 21st-

Jonathan's mean score on his first 3 'MATH1003' tests is 72%, what mean score does he need on his next 2 'MATH1003' tests to bring his overall test mean up to 80%? *Answer: 92%*