10ticks Friday Puzzle

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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!

See the latest Friday Puzzle below and look at all the past puzzles. Get the Friday Puzzle straight to your phone, follow us on Twitter. The first 5 correct answers join our Hall of Fame!

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!

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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?

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Friday Puzzle (14/02/2020)

The number 12345 can be expressed as the sum of two prime numbers.


What are the two prime numbers?

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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!)

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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?

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Friday Puzzle (24/01/2020)


Find n.

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Friday Puzzle (17/01/2020)



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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?

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Friday Puzzle (13/12/2019)

The hexagon inside the large triangle is regular.

hexagon in triangle

The area of the large triangle is 180 cm2.

What is the area of the blue triangle?

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Friday Puzzle (06/12/2019)

Jenny has some balance scales and just 4 weights.

balance scales

She can use the 4 weights to measure any whole number of kilograms up to 40 kg.

What are the 4 weights?

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