10ticks Friday Puzzle

This week's Friday Puzzle

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?

Friday Puzzle (29-11-2019)

Alison went to the Black Friday sales. She spent half her money on her Dad’s xmas present and a third of her money on her Mum’s xmas present.

Then she spent two-thirds of the money she had left on the cat’s xmas present. The last £3 she spent on a coffee.

How much did Alison start off with?

Friday Puzzle (22-11-2019)

Lynne, Ian and Edward share a bag of jelly babies.

Lynne and Ian eat ⁸/₁₅ of the jelly babies.

Edward and Lynne eat ¹¹/₁₂ of the jelly babies.

What is the least amount of jelly babies that Lynne eats?

(Only whole numbers of jelly babies are eaten).