Showing posts with label Johnny Ball. Show all posts
Showing posts with label Johnny Ball. Show all posts

Monday, 3 December 2012

Monday Maths Madness 20

Today is the last Monday of my first term at university. It has gone by so quickly, but I am ready to come home at the weekend. I keep counting down the days, I can't wait! In the meantime, I have run out of pictures, so I think it's time for more puzzles. These are from Ball of Confusion again.


As I am sat here learning Christmas songs for Glee club, I feel it is appropriate to start with a Christmas puzzle.

Christmas past, Christmas presents

On the first day of Christmas my true love sent to me, a partridge in a pear tree. That was 1 present, but on the second day of Christmas, my true love sent to me, 2 turtle doves and a partridge in a pear tree. That was 3 more presents - 4 in total. We know, of course, that this continued for the entire 12 days of Christmas.

How many presents arrived on the 12th day of Christmas? How many presents arrived over the entire 12 days?

What to wear where

Three girls turned up to a party in a black dress, a green dress and a white dress. They were Miss Black, Miss Green and Miss White. Miss Black said, "It's amazing - our dresses match our names, but none of us is actually wearing the dress that matches her name."

The girl in green said "So what?".

Who was wearing which dress?

A toast to toast

You only have a grill and space for two pieces of bread under it, so it takes 4 toastings to do 3 slices on both sides. Or does it?

Can you toast 3 pieces of bread on both sides in less than 4 toastings?

That's all from me this week. I would find more, but I have songs to practise. Answers on Wednesday!

Wednesday, 10 October 2012

Monday Maths Madness 12 (part 2)

As promised, here are the answers to the puzzles I gave on Monday.

1. Fumbling in the dark.

I would need to take 4 shoes to be sure of having a pair that match. If you took only 3 shoes, you could have taken one of each pair, so taking one more ensures you definitely have a pair of matching shoes.

Similarly, I would need to take 3 socks to be sure of having a pair that match.

2. Animal Farm

He would still have 50 horses - calling a cow a horse doesn't make it a horse.

3. Sum for simpletons

56 = 7 x 8

4. An up and down kind of existence

There is an absolute certainty that the monk will be at the same point on the road at the same time of day. Because the monk leaves later and arrives earlier on the second day than on the first day, there isn't a time of day on the second day that he was walking when he wouldn't have been on the first day. Therefore, if you imagine both journeys being made on the same day by two different monks, there comes a point where the two monks would have to walk past each other.

Monday, 8 October 2012

Monday Maths Madness 12

For anyone who is into Strictly Come Dancing, you will know that one of the celebrities is Johnny Ball. Johnny Ball is a TV personality from the 70s and 80s, and is known for popularising maths and science for children.

A little while ago, I can't remember exactly when, my mum bought me a book written by Johnny Ball. It is called Ball of Confusion, which is a collection of puzzles to do with maths, inspired by when he presented a puzzle on Zoe Ball's (his daughter) Radio 2 show. As Strictly just started this last weekend, I thought I would give a few puzzles from the book for you to ponder over.

1. Fumbling in the Dark

The lights have gone out - I said we should never trust wind farms - and I have to search my wardrobe in the dark for a pair of shoes and socks.

I have 3 pairs of shoes, 12 pairs of black and 12 pairs of brown socks.

How many of each do I need to take, to be sure I have a matching pair of each to wear?

2. Animal Farm

A farmer has 20 goats, 30 cows and 50 horses. How many horses would he have if you called the cows 'horses'?

3. Sum for simpletons

Look at this: 12 = 3 x 4.

Can you think of four other consecutive digits that do that?

4. An up and down kind of existence

A monk lives on a river bank in a valley. Once a week he must travel to the monastery at the top of the Lonely Mountain. He sets off at dawn, as the road is steep and long, and he arrives as the Sun sets. Next morning he has a lie in and leaves for home at 10am. As the road is downhill all the way, he arrives home at around 3pm.

What are the chances of the monk being at exactly the same point on the road, at exactly the same time on both days?

Answers on Wednesday! (Just to annoy my sister :P)