Riddles & Brain Teasers

[MrKaplansGlasses]

Does anyone know any good ones? DH and I live an exciting life and have been trying some brainteasers out on each other. I appear to have run out now but I want some really tricky ones to get him with tomorrow if anyone can help!

@MongerTruffle The elevator...my head hurts! I can not work it out!
I am going to say you should jump constantly as my maths would just be rubbish anyway so I wouldn't trust it. So start jumping constantly and hope for the best!

Do I live?

Ok...im 6.5 seconds?

There's an 'm' - 10th letter from right.

It doesn't matter. In the time it would take you to calculate it, you would have hit the bottom of the shaft.

(If you ever do find yourself in a free-falling lift, don't jump. Instead, lie down on your back with your hands on your head to evenly distribute the pressure across your body. Your bones will probably be shattered anyway, but it'll decrease your chance of death.)

EASTER WORD SEARCH.Can you Find the following words. Words will go either Up Down Diagonally or across.
Easter Lamb. Chick. Bunny.Kid. Egg. Spring

WAIFHRHDEBNIOPYQBOP
EEWACHICKWRZNMDLSA
ARFSJMMGBPARTJKIADV
ACKEDVIEOUDKIFHNMSE
ASTISESCAJOPEVUHBSR
WEADAHAJBUNEGTAIOSJ
AKLASBUNNYASFIQEGGX
NSAEEVEASRTEVWAAET
ADFTSHJCIOPNMECEAH
AVERWQWERTYDACESPX
DHVNIOOEVLIPWRARTAL
SERTWSNIOENMEAVESO
FQBEMELIEABWNRARSL
HRGKIAOOAJSWRIDANA
AFTERASRESPRINPSEAV
SPRIOPAVSESPRINGCKL
AFHJIOPCMEVEDBECFO
VCSWERTUXPDVIARTVI

I don't see how you could jump in the lift, as you would be in free fall and presumably lose contact with the floor.

Jump out just before the doors close?

The cigarette one earlier made me remember this which is more physics than a riddle:

A man in a boat rows out into a small lake. When he gets to the middle he picks up a large heavy brick that is lying in the boat and drops it into the deepest part of the lake. Assuming that any change in level of the lake is not insignificant does the level go up, down or stay the same?

This is a bit of an oldie, but it's good:

Three friends are splitting the bill after a meal out at a restaurant. The
waiter says the bill is £30, so the guests split it evenly and pay £10 each.

As he’s walking away the waiter realises that he’s overcharged the group and the bill should only be £25.

In order rectify this, he takes the £5 that is owed to the guests in order
to bring the bill down to £25. On the way back to the table, he realises
that he cannot divide £5 equally between three people.

As the customers are still unaware of the actual total of the revised bill, the waiter decides to just give each of the three friends £1 each and then keep the leftover £2 as a tip for himself.

Basically, each customer got £1 back: meaning they only paid £9 each; bringing the total paid to £27. The waiter has the leftover £2.

The £27 the customers paid, + the £2 the waiter kept = £29 so, if the
diners originally handed over £30, what happened to the remaining £1?

I think the level of the lake will stay the same, as the stone was in the boat, which is in the lake anyway.

Has nobody worked out where the birthday girl's money is hidden? She's still blindfolded and hunting for it, only be told it is in front of her, no matter how much she moves about!

Is it tucked into her blindfold?

With the brick in a boat: a floating object displaces its own weight of water, whereas a sinking object displaces its own volume of water.

1. When the brick is in the boat, it is "floating", as it is part of the floating boat. The water displaced will equal the weight of the brick; this will be greater than the brick's volume of water. (Must be, or the brick would not sink.)

2. When the brick is dropped into the lake, the water displaced will be equal to the volume of the brick; less water displaced than in stage 1.

Therefore, the level in the lake goes down. I don't know the official answer, but that's my reasoning!

5

@ScreamingValenta to match the birthday girl when she finally twigged. She thought she knew all the hidey holes in the living room!

@wanderings is correct because the brick weighs more than the volume of water it displaces. Imagine the brick was 1 tonne and how much it would push the boat down into the water until it was dropped off the boat.

I knew someone that had this as a job interview question,

Yes, th

Bother..

The gold/feathers is because you weigh gold ising the troy system rather than avoirdupois. One troy ounce is actually 1.1 oz, bit there are 12 to a pound rather than 16.

ScreamingValenta - the restaurant made the same mistake with a couple (charging £30 instead of £25), and the waiter decided to do the same trick again.

He gave each person back £1, and kept £3 for himself.

So they’d each paid £14, giving £28, plus the £3 he’d kept for himself. £28 + £3 = £31

There’s your missing pound

@ScreamingValenta as convincing as your summary is, it’s because the summary is incorrect. They did each pay £9 so £9 x 3 = £27 against a £25 bill with the waiter having the missing £2.

@PolkadotsAndMoonbeams
@Liaoyang Yup! The reference to £30 in the summary is a red herring.

A man is out for his morning run; he is wearing exactly five pieces of clothing. For him to be (reasonably) sensibly dressed, what are they? A pair of shoes counts as two items.

I suspect I am missing something but -

trainers (2) underpants (1) shorts (1) t-shirt (1)

Sock, sock, shoe, shoe, LEOTARD!

There's a guy on my road who runs barefoot, so how about pants, shorts, t-shirt, tracksuit top and novelty hat?