10ticks Friday Puzzle
Welcome to Ian’s Friday Puzzle! Dust off those Friday cobwebs with a little manipulation of the old grey matter. Perplexing puzzles, logical, illogical, and sometimes just plain stupid. Be prepared to be bewildered, befuddled and bedazzled!
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This week's Friday Puzzle
A number is increased by four and the result doubled. This result is squared, which gives a number that is eight more than 68 times the original number.
Find two possible answers!
Friday Puzzle (21/02/2020)
A cheetah can run as fast as 75 mph in short bursts.
A snail only manages half a mile in 15 hours.
How many times faster can a cheetah move than a snail?
Friday Puzzle (14/02/2020)
The number 12345 can be expressed as the sum of two prime numbers.
What are the two prime numbers?
Friday Puzzle (07/02/2020)
I have five whole numbers and they have no mode.
Their median is 6 and mean is 5. Their range is 9.
What are the five numbers?
(There may be more than one answer!)
Friday Puzzle (31/01/2020)
In my fully limbed collection of 186 spiders and ladybirds I count 1300 legs.
How many spiders do I have? How many ladybirds do I have?
Friday Puzzle (24/01/2020)
Find n.
Friday Puzzle (17/01/2020)
Simplify
Friday Puzzle (10/01/2020)
To the end of January 2020, there are 31 days, to the end of February 2020 there are 60 days (31 + 29).
How many months do we have to go into 2020 for this end of month number to become
a). a square number;
b). a prime number;
c). a triangular number?
Friday Puzzle (13/12/2019)
The hexagon inside the large triangle is regular.
The area of the large triangle is 180 cm2.
What is the area of the blue triangle?
Friday Puzzle (06/12/2019)
Jenny has some balance scales and just 4 weights.
She can use the 4 weights to measure any whole number of kilograms up to 40 kg.
What are the 4 weights?