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


Replace letters with digits so the sum is true.

There are quite a few solutions.

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Friday Puzzle (13/09/2019)

What is the smallest prime number that will divide exactly into

3333 + 7777 ?

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Friday Puzzle (06/09/2019)

How many whole numbers between (and including) 1 and 300 are NOT divisible by 3 nor by 5?

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Friday Puzzle (26/07/2019)

Five different whole numbers have a median and mean of 6 and a range of 8. Three of the numbers are prime.

What are the five numbers?

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Friday Puzzle (19/07/2019)

I have between 300 and 400 seeds to plant.

If I plant them in in rows of 24 there are 17 seeds left over.

If I plant them in rows of 15 there are 2 seeds left over.

What length of rows could I plant the seeds so there are none left over?

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Friday Puzzle (12/07/2019)

In the World Cup, a cricketer’s average after the first 5 innings was 23.2 runs.

After a further 4 innings his average increased to 42 runs.

What was his average for the last 4 innings?

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Friday Puzzle (05/07/2019)

Farmer Paul has a grassy field. It can feed one cow for 5 days or one goat for 20 days.

If Farmer Paul puts one cow and one goat in the field, how long would the grass last?

(The grass won’t grow back!)

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Friday Puzzle (28/06/2019)

Lynne multiplies all the natural numbers from 1 to 99 together.

1 × 2 × 3 × ............ × 97 × 98 × 99

How many zeros will be at the end of the answer?

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Friday Puzzle (21/06/2019)

At the start of a test I saw that the length of the test in minutes was 5 times the number of questions on the test.
45 minutes later I had answered 11 questions, and saw that the number of minutes remaining was now 6 times the number of questions remaining.

How long was the test?

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Friday Puzzle (14/06/2019)

135 = 11 + 32 + 53

135 has the special property that it is equal to the sum of the first digit to the power 1, the second digit to the power 2 and the third digit to the power 3.

There are another three 3-digit numbers that have this property. Find one of them.

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