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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By adding plus signs between the numbers 9 8 7 6 5 4 3 2 1 make 99 in two different ways!
8000 is 20^3.
It is also the sum of four consecutive cubic numbers.
Find these four cubic numbers.
How can you ADD eight 8s to get the number 1000?
Replace letters with digits so the sum is true.
There are quite a few solutions.
What is the smallest prime number that will divide exactly into
3333 + 7777 ?
How many whole numbers between (and including) 1 and 300 are NOT divisible by 3 nor by 5?
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?
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?
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?
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!)