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Posts tagged with puzzle

Puzzle Time

December22

What is the largest number between 0 and 1 million that does not contain the letter ‘n’? [answer in post support]

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Find the Prize – a great logic problem

October31

A prize is hidden under one of the following objects: One student is secretly told the shape the prize is under, and another the colour. When asked if they know the answer, they give the following responses: Question: Under which object is the prize? If you need a clue, check out ‘Post Support’.

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Another Algebra Puzzle

June16

These Algebra Puzzles seem to crop up from time to time. However, if you are following the rules of operations (see BEMA post), the logic rules and the answer is easy. A reminder: B E M A means we solve in this order—Brackets first, then Exponents (or powers. There are none in this question); Multiplication/Division; […]

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How long to Drive to the Sun?

October7

How long would it take to drive to the sun? Longer than you think. The distance from the Sun to the Earth is around 93 million miles. Theoretically, If a person drove a car (with an unlimited amount of fuel) at a speed of 93 miles an hour (about 150 km/hr), then it would take […]

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Scratching heads with 7 year old’s math homework

October3

A mother has turned to social media asking for help with her 7-year-old son’s math homework after it left her completely “baffled”. It also stumped another parent with a maths PhD. So, how do you approach this rather complex looking problem? Here’s one way” What is the total value of the counters? (Answer in post support) […]

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How can someone born in 2020 be older than someone born in 2019?

January4

Solution: If someone is born, say, at 1am in the morning of January 1 2020 in Sydney, then everyone born in the UK in the afternoon of December 31 2019 will be younger than them but born the previous year. In fact, the number of people born in 2020 who are older than someone born […]

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The Rise of Skywalker Challenge

December15

Star Wars was the sensation of escape movies – a modern reinvention of the old time cowboy movies, where the good sheriff faces off against the unpleasant baddie (who was always dressed in black). Now, in a universe far, far away, the themes are exactly the same, although the weapons are different. Now the time […]

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And a bit of fun for a change …

February20

How many spare parking spaces are in this picture?see Post Support for answer

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The 25 Horses Puzzle

November23
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What fraction of the square is the pink triangle?

April27

Using your knowledge of Areas, work out what fraction the pink triangle is of the square (answer soon in post support):

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« Older Entries

Post Support

Largest number between o and 1 million which does not contain the ‘n’ is 88

 

Rotation SAT Problem: Answer: 4 (see: https://www.youtube.com/watch?v=FUHkTs-Ipfg)

 

Which number has its letters in alphabetical order? Answer: F O R T Y

Hidden Rabbit? Clue: check the trees

How long for the stadium to fill? 45 minutes.

Where are you? the North Pole

Prize Object Puzzle: If Sue does not know where the prize is in the first question, it can’t be under the square. She must have been told it is under another shape. Apply this same logic to Colin. It is then obvious that the prize cannot be under a yellow object. That helps Sue eliminate her yellow shapes. Got the idea?

Algebra Puzzle: Answer = 1

Popular Math Problems Answers: 1, 1

Number of tabs? According to Lifehacker, the ideal number of tabs you should have open is nine. Yes, a single digit. To some, this is like playing a piano and only using a fraction of the notes!

Worst Graph? Where to start. What a visual mess and even some of the lines merge and are impossible to follow. A graph is a visual display of data, with the goal to identify trends or patterns. This is a spider’s web of information which fails to show a clear pattern at all. Solution? Well, different colors would help, or why not group in two or three graphs where trends are similar?

Number of different nets to make a cube is eleven – see this link

Homework Puzzle; The total value of the counters is 486, so halve this to get 243. Now, arrange the counters to equal this amount twice.

The graph on the left (Coronavirus) is for a time period of 30 days, while the one on the right (SARS) is for 8 months! Very poor graphical comparison and hardly relevant, unless it is attempting to downplay the seriousness of the coronavirus?

10 x 9 x 8 + (7 + 6) x 5 x 4 x (3 + 2) x 1 = 2020

NCEA Level 2 Algebra Problem. Using the information given, the shaded area = 9, that is:
y(y-8) = 9 –> y.y – 8y – 9 =0
–> (y-9)(y+1) = 0, therefore y = 9 (can’t have a distance of – 1 for the other solution for y)
Using the top and bottom of the rectangle,
x = (y-8)(y+2) = (9-8)(9+2) = 11
but, the left side = (x-4) = 11-4 = 7, but rhs = y+? = 9+?, which is greater than the value of the opp. side??
[I think that the left had side was a mistake and should have read (x+4)?]

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