a mindf***er for you all :)

so you see a shirt online for £97
you have no money so you borrow £50 from your mum and £50 from your dad
you buy the shirt and get £3 change, you give £1 to your mum and £1 to your dad and keep £1 to yourself
so now you owe £49 to your mum and £49 to your dad
£49 + £49 = £98 adding to the £1 you took so £99
where is the missing £1?

Reply 1

fatiana

22

Original post by Anonymous

so you see a shirt online for £97
you have no money so you borrow £50 from your mum and £50 from your dad
you buy the shirt and get £3 change, you give £1 to your mum and £1 to your dad and keep £1 to yourself
so now you owe £49 to your mum and £49 to your dad
£49 + £49 = £98 adding to the £1 you took so £99
where is the missing £1?

didn't intend to make it anonymous loool

Reply 2

Rhythmical

21

A mind**** for me is why are you on anonymous?

Reply 3

PossiblyNotGod

20

keep £1 to yourself
you owe 49.50 to your mum and the same to your dad.

Reply 4

excaliburn

There is no missing £1. The shirt is worth £97, you keep £1 for yourself, give £1 to your mum and £1 to your dad. That equals £100!

Reply 5

PossiblyNotGod

20

There are 10 cubes in a case - 1 is white. You reach in the case 50 times. After drawing a cube, it is placed back in the case. What is the probability of drawing the white cube at least once?

EDIT: @CheeseIsVeg any idea on the answer? :colone:

(edited 7 years ago)

Reply 6

CheeseIsVeg

22

Original post by XOR_

There are 10 cubes in a case - 1 is white. You reach in the case 50 times. After drawing a cube, it is placed back in the case. What is the probability of drawing the white cube at least once?

EDIT: @CheeseIsVeg any idea on the answer? :colone:

the answer is

Spoiler

Reply 7

Anonymous #1

OP

Original post by excaliburn

There is no missing £1. The shirt is worth £97, you keep £1 for yourself, give £1 to your mum and £1 to your dad. That equals £100!

nooo
1 to your mum one to your dad and
wait wtf
omg im mindf***d all over again

Reply 8

fatiana

22

Original post by Rhythmical

A mind**** for me is why are you on anonymous?

forgot to untick the anonymous box

Reply 9

electrifeye

2

Original post by XOR_

There are 10 cubes in a case - 1 is white. You reach in the case 50 times. After drawing a cube, it is placed back in the case. What is the probability of drawing the white cube at least once?

Ah, the memories of A level maths

X~B(50, 0.1)
p(X>=1) = 1 - p(X=0)
= 1 - 0.0148
= 0.9852

I really hope that's right.

Reply 10

Airmed

21

What even is this thread? :rofl:

Reply 11

CraigBackner

20

here you go:

https://www.quora.com/I-borrowed-50-from-mum-and-50-from-dad-to-buy-a-bag-costing-97-After-the-purchase-I-had-3-left-I-returned-1-to-dad-and-1-to-mum-and-reserved-1-for-myself-I-now-owe-49+-49-98-plus-the-1-I-reserved-for-myself-which-is-99-Where-is-the-missing-1

Reply 12

fatiana

22

Original post by CraigBackner

here you go:

https://www.quora.com/I-borrowed-50-from-mum-and-50-from-dad-to-buy-a-bag-costing-97-After-the-purchase-I-had-3-left-I-returned-1-to-dad-and-1-to-mum-and-reserved-1-for-myself-I-now-owe-49+-49-98-plus-the-1-I-reserved-for-myself-which-is-99-Where-is-the-missing-1

my brain hurts o.O

Reply 13

The Sikh Doctor

11

If you give them the one pound you took then the value would go down and not up so the 49 + 49 = 98. This is the overall debt. Then you pay them another pound so the debt goes down to 97. The thing you bought was 97. Solved it

Reply 14

Zesty_Lemon

1

You owe each parent 97/2=48.50 for the shirt and then are left needing to pay back the £3 change.

In this problem, at the end yeah you do owe £49 to each parent having already given £1 to each. Even though you kept £1 for yourself, you still owe them £49 each its just that that £1 you've taken is included in that value rather than being something you need to add on or take away from it.
As you've taken £1, you still owe £49, it's not as if you'd only give them each £48.50, hence only giving £99 back because you kept £1 unless you REALLY want to slightly rip off your parents.

(edited 7 years ago)

Reply 15

math42

20

Like the waiter thing, or hotel thing, idk, it involves $30 whatever it is, of a similar vein this is in reality a rather stupid question. £97 of the £98 you owe after giving £2 back lies with the shirt-sellers. You pocketed the other £1. Simple. There is nothing surprising or strange about the fact that the sum of the money owed and the money you now have is not equal to the original £100 borrowed.