Big as a biscuit, deep as a cup, even a river can't fill it up. What is it? | Thinkmad.in

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Big as a biscuit, deep as a cup, even a river can’t fill it up. What is it?

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My first is found on the ocean wave, In the spring, the pit, and the mine; My second below earth’s surface you have, Where seldom the sun can shine. My whole your dinner-table must grace, And seldom fails to obtain a place. What am I?

I run over fields and woods all day. Under the bed at night I sit not alone. My tongue hangs out, up and to the rear, awaiting to be filled in the morning

You want to send a valuable object to a friend. You have a box which is more than large enough to contain the object. You have several locks with keys. The box has a locking ring which is more than large enough to have a lock attached. But your friend does not have the key to any lock that you have. How do you do it? Note that you cannot send a key in an unlocked box, since it might be copied.

Suppose you want to send in the mail a valuable object to a friend. You have a box which is big enough to hold the object. The box has a locking ring which is large enough to have a lock attached and you have several locks with keys. However, your friend does not have the key to any lock that you have. You cannot send the key in an unlocked box since it may be stolen or copied. How do you send the valuable object, locked, to your friend – so it may be opened by your friend?

Hard iron on horse. Cow’s hide on man.

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