@mathconfidence

Robin the Math Lady: Math is a Workout for Your Brain... Advocate, Tutor, Coach, Mentor, Prof, Mom, Speaker, author Build Math Confidence e-newsletter

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mathconfidence.com
Joined November 2008
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April 2023 Brain Puzzler Solution mathconfidence.com/2023/04/2…

April 2023 Brain Puzzler Solution

96 = 2^5 x 3^1

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March 2023 Brain Puzzler Solution mathconfidence.com/2023/03/2…

March 2023 Brain Puzzler Solution

54 x 18 = 972 As all the numbers in the 990s repeat a 9 and 989 and 988 also have repeating digits, the first number to check is 987. Count down from there checking each number for its factors.

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Build #Math Confidence February 2023 newsletter Brain Puzzler Solution #iteachmath #maths #math #mtbos #mathteacher mathconfidence.com/2023/02/2…

February 2023 Brain Puzzler Solution

Q: What is the difference between the sum of the first 2023 even counting mumbers and the sum of the first 2023 odd counting numbers? A: 2023If we “solve a simpler problem” (like Polya …

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January 2023 Brain Puzzler Solution mathconfidence.com/2023/01/2…

January 2023 Brain Puzzler Solution

Q: Without a calculator or the Internet, find the prime factors of 2023. A: Try prime numbers. First: 2 the number is not even so 2 is not a factor.For 3, we have to check the sum of the …

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October 2022 Brain Puzzler Solution mathconfidence.com/2022/10/3…

October 2022 Brain Puzzler Solution

With only two moves, turn the above five into four. Click on this link to see the solution:

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September 2022 Build Math Confidence enewsletter Brain Puzzler Solution #mtbos #iteachmath #maths mathconfidence.com/2022/09/2…

September 2022 Brain Puzzler Solution

Post by @mathconfidence.

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August 2022 Build Math Confidence enewsletter Brain Puzzler Solution #iteachmath #mtbos mathconfidence.com/2022/08/3…

August 2022 Brain Puzzler Solution

Q: Suppose you want to cut a circular cake with six straight cuts. What is the maximum number of pieces you can create? They can be different sizes but cannot be moved around. A: 22 pieces.The figu…

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July 2022 Brain Puzzler Solution mathconfidence.com/2022/07/2…

July 2022 Brain Puzzler Solution

Q: Suppose you want to cut a circular cake with five straight cuts. What is the maximum number of pieces you can create? They can be different sizes but cannot be moved around. A: 16 pieces…s…

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June 2022 Build #Math Confidence Brain Puzzler Solution #iteachmath #mtbos mathconfidence.com/2022/06/2…

June 2022 Brain Teaser Solution

Place numbers (1 to 9) in the blank circles. Each number can only be used once. Each sector’s number is equal to the sum of the three numbers next to its sector. Find the missing numbers.

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May 2022 Brain Puzzler Solution mathconfidence.com/2022/05/2…

May 2022 Brain Puzzler Solution

Q: A mother told her daughter “I was thrice as old as you two years ago. In 14 years, I will be twice as old as you.” What is the current age of the mother and daughter? A: The mother i…

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April 2022 Brain Teaser Solution mathconfidence.com/2022/04/2…

April 2022 Brain Teaser Solution

This was a Medium puzzle with all operations.You can play more KenKen here

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March 2022 Brain Puzzler Solution mathconfidence.com/2022/03/2…

March 2022 Brain Puzzler Solution

A: 454585The first two digits are the product of 9 x 5The third and 4th digits are the product of 9 x (the other 5)The 5th and 6th digits are 45 + 45 – middle digit = 90 – 5 = 85

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February 2022 Brain Puzzler Solution mathconfidence.com/2022/02/2…

February 2022 Brain Puzzler Solution

Q: You are painting a square wall that is 12 feet by 12 feet.When you are halfway done, the unpainted part of the wall is still a square that measures 12 feet from top to bottom by 12 feet from sid…

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January 2022 Brain Puzzler Solution mathconfidence.com/2022/01/1…

January 2022 Brain Puzzler Solution

Q: A snail is at the bottom of a 12-foot well. She climbs up 3 feet during the day, but slides back 2 feet each night. How many days will it take her to get out of the well?A: 10 daysAfter 5 days, …

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December 2021 Brain Puzzler Solution mathconfidence.com/2021/12/2…

December 2021 Brain Puzzler Solution

Q: Start with 100 coins: 10 stacks of 10 coins each.In 9 of the stacks, the coins all weigh 1 ounce but one stack has coins that weigh 2 ounces. Using only a digital scale and only one weighing, id…

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NOVEMBER 2021 BRAIN PUZZLER SOLUTION mathconfidence.com/2021/11/2…

November 2021 Brain Puzzler Solution

Q: At 5 o’clock, it takes 5 seconds to strike 5 chimes on a chime clock. Assuming the chime takes negligible time, how long will 12 chimes take at 12:00? A: 13.75 secondsThe total time is 5 s…

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October 2021 Build #Math Confidence Brain Puzzler Solution #iteachmath #mtbos #maths mathconfidence.com/2021/10/2…

October 2021 Brain Puzzler Solution

Find the seven differences between the photos Many thanks to Reader’s Digest for this fun and yummy brain teaser. Here is the solution and the link:

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Build #Math Confidence enewslletter September 2021 Brain Puzzler Solution #iteachmath #mtbos #maths mathconfidence.com/2021/09/2…

September 2021 brain puzzler solution

There are 10 books to choose from on a reading list. Mr. Lee would like his students to read any 5. Tameka chooses 5 books randomly as does Nadeem. Find the probability there are exactly two books …

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August 2021 brain puzzler solution mathconfidence.com/2021/08/2…

August 2021 brain puzzler solution

Move 3 matchsticks to create a figure with 5 squares SOLUTION: Make sure you count the outer square! :)

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July 2021 brain puzzler solution mathconfidence.com/2021/07/2…

July 2021 brain puzzler solution

Q: Represent the number 1 using the numbers 2, 3, 4, 5, 6, 7, 8 and 9 one time each.A: 1 to the 23,456,789 power = 1!Also 1 + (2 – 3) – (4 – 5) + (6 – 7) – (8 – …

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