Riddles and Brain Teasers

ABCD equals DCBA

What 4-digit number abcd satisfies this equation?

4 × abcd = dcba

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2178

4 × 2178 = 8712

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Not Want to Have But Not Want to Lose

What do you not want to have and not want to lose?

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A lawsuit.

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How Can You Pass the Tree

A car is on a narrow road with a tree in the middle of it. How can the car pass the tree?

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The tree is in the middle of the road as measured by length, not in the middle of it by width. In other words, the tree is growing on the side of the road, but it is equidistant from either end of the road, and therefore in the middle.This makes it quite easy to pass the tree as you just drive on the road, unless you’re texting and you run into said tree. If this is the case, stop texting.Thanks to everyone’s input on this one!

This makes it quite easy to pass the tree as you just drive on the road, unless you’re texting and you run into said tree. If this is the case, stop texting.

Thanks to everyone’s input on this one!

Posted in Brain Teasers

011 235 Sequence

011 235 813 213 ???

What comes next?

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455. The numbers are from the Fibonacci sequence in groups of 3. The next numbers in the series are 34 (the 3 was already used in 213) and 55.

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Tagged with sequence

Swallow

You can swallow me, but I can swallow you. What am I?

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Water.

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Tagged with What am I?

Ground Not For Thy Daily Bread

Ground not for thy daily bread,
Leave me in my scented bed,
Ignore me not, lest I doth wither,
My name I leave you to consider.

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A flower. The soil they grow in is not used for food, like wheat to make bread, but for their smell. A neglected flower will wither.

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The Tortoise, Onion and Tomato

What is three-eighths tortoise, two-fifths onion and two-sixths tomato?

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Toronto3/8 tortoise = TOR (the first three letters)
2/5 onion = ON (the first two letters)
2/6 tomato = TO (the first two letters)

Toronto

3/8 tortoise = TOR (the first three letters)
2/5 onion = ON (the first two letters)
2/6 tomato = TO (the first two letters)

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Tagged with What am I?

To Frighten a Thief

What four letters frighten a thief?

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OICU (Oh I see you!)

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Thought Follows Closely Behind

I can run but not walk. Wherever I go, thought follows close behind. What am I?

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A nose.

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Blindly Picking Socks

You have 12 black socks and 12 white socks mixed up in a drawer. You’re up very early and it’s too dark to tell them apart. What’s the smallest number of socks you need to take out (blindly) to be sure of having a matching pair?

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Three socks. If the first sock is black, the second one could be black, in which case you have a matching pair. If the second sock is white, the third sock will be either black and match the first sock, or white and match the second sock.

Sock drawer

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