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!

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This week's Friday Puzzle

Simplify

√1 × √2 × √3 × √4 × √5 × √6 × √7 × √8 × √9 × √10

 

No calculator, think pairs! 

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Friday Puzzle (20-03-2020)

Jane buys three different bricks for £10.50.

None are free.

1 brick costs 3 times another.

1 brick costs 8 times another.

What is the price of the cheapest brick?

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Friday Puzzle (13-03-2020)

Find two numbers, neither of which has a 0 digit, whose product is 1 000 000 (one million).

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Friday Puzzle (06-03-2020)

I’m thinking of a number.

It is the sum of all the natural numbers from 1 to 1000.

What is the number?

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Friday Puzzle (28-02-2020)

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)

equation

Find n.

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