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Friday's Maths Brain Teasers ? ❓

(115 Posts)
Marydoll Fri 03-Apr-20 07:58:22

For those of you enjoying the brain teasing, here is today's first challenge.

I will not post the solution until tonight, to allow those in different time zones to have a go.

Marydoll Fri 03-Apr-20 16:36:19

Callistemon, I know where you are coming from, but this puzzle has only 4 lines.

If it was to be a sequence, that would absolutely be correct and would have said so.
I too overthink and tend to look for more than is asked. grin
However, I never said it was a sequence. wink

Callistemon Fri 03-Apr-20 16:43:16

so no cupcake then?

sad

Marydoll Fri 03-Apr-20 16:48:17

Of course you can have a cake! grin You have worked so hard and argued your case so well.

The children in my class knew I was a tricky so and so and knew to read everything carefully.
Don't trust me, that's all I'm saying! wink

Callistemon Fri 03-Apr-20 16:59:34

Thank you Marydoll

I was probably the pupil sent to stand in the corner for arguing stating my case and standing my ground

Marydoll Fri 03-Apr-20 17:00:08

Tomorrow's is going to cause all sorts of disagreements. We may need a referee! grin

Marydoll Fri 03-Apr-20 17:01:36

That's the kind of pupil I loved!

Gemini17892 Fri 03-Apr-20 17:06:14

I agree

Marydoll Fri 03-Apr-20 17:08:36

Are you offering us a drink?

Not only am I being shielded, no alcohol allowed? sad

Gemini17892 Fri 03-Apr-20 17:13:32

Not even a virtual cocktail ? ??‍?
Those buns look yummy ?????but I didn’t read the question on the first one so slapped wrist for me too. In the corner with Calli.

Marydoll Fri 03-Apr-20 17:15:18

No slapped wrists on my watch, other ways of punishing you! wink grin

Doodle Fri 03-Apr-20 20:41:50

Now look marydoll I’ll accept 7 sheep.
callistemon and I both got 51 days (so we get double cakes right?)
But where does the 40 come from (I’ve had a drink so explain slowly)
My logic (not two words I usually use in the same sentence ?) was 4 x 1 +1 = 5 2x5+2 =10 etc so 8x11+8 = 96
Maths not being my strong point (waiting to find out what is) please explain the 40.

Yummy cakes by the way ?

Marydoll Fri 03-Apr-20 21:14:10

^ Haud the bus, there! *Doodle please reverse back up the thread please and read the explanation I gave Callistemon.

There were only 4 lines in the puzzle! I didn't ask for the 8th line, I asked for the answer to line four.? It wasn't intended to be a sequence. It was a bit sneaky. Sorry!

Marydoll Fri 03-Apr-20 21:17:58

Tomorrow's may be even trickier. I will need to word it carefully.
I have failed, a good teacher assumes nothing and makes it clear what is expected! blush

Doodle Fri 03-Apr-20 21:23:33

Miss....Miss, please Miss it’s Doodle here at the back of the class with the dunces hat on. Please Miss I still don’t understand how you get 40 Miss.............What’d yer mean I’ve got detention ?

Marydoll Fri 03-Apr-20 21:41:06

Never Doodle, you are teacher's pet.?

8+11 total from the previous line (21,) = 40.

Callistemon Fri 03-Apr-20 21:55:11

Doodle have a wine calm down dear, it's only an advert for the algebra which is yet to come.

I got 40 first time (see above somewhere) but thought it was too easy so I was overcomplicating it.

gillybob Fri 03-Apr-20 22:20:26

Please miss . I know I talk too much but I’m a good girl really . x

Callistemon Fri 03-Apr-20 22:22:10

Miss Marydoll she keeps digging her pencil into me

Tell her

gillybob Fri 03-Apr-20 22:46:04

miss it’s not me it’s her, she started it .....

Callistemon Fri 03-Apr-20 22:48:41

If I give you my Freddo will you be nice to me?

Marydoll Fri 03-Apr-20 22:55:06

GIRLS!, said in a verrrrrryy scary voice. ?️?️?️?️?️?️?️?️?️

Doodle Fri 03-Apr-20 23:05:03

Oh I get it now (eventually breathes Miss with a sigh ?)

I’m teachers pet callistemon, Miss said so, so there ?

Marydoll Fri 03-Apr-20 23:15:15

Good night Girrrrrrrrrls. I will see you tomorrow. ?????????

willa45 Fri 03-Apr-20 23:28:14

As Calistemon pointed out, those of us who came up with 96 might have overthought the problem when we (industriously) completed the gap between rows 3 and 8 (nos. in the first column).....or were we exercising due diligence?

Initially, I came up with 21+19 = 40 but soon concluded that it was the wrong answer, because their is a gap with missing numbers in the first column.
Can an argument be made that the first column is missing four rows (4, 5, 6 and 7)? Wouldn't those also have to be completed in order to come up with the true value for row 8?

willa45 Fri 03-Apr-20 23:28:55

there is a gap not their sorry