I am periodically the number 79. Long ago, some attempted to make me from 29, but learned it couldn’t be done. If you add me to 80 I appear to be 47 temporarily.
Gold is represented by the number 79 on the Periodic table of elements. Long ago, alchemists tried to make gold from copper.(number 29) If you add gold to mercury (number 80) it will appear to be silver for a time.
A woman holding a baby walks into a drug store and asks if she can use the store’s baby scale.
“Sorry, ma’am,” says the storekeeper. “Our baby scale is broken. But we can figure the baby’s weight if we weigh mother and baby together on the adult scale, and then weigh the mother alone, and subtract the mother’s weight.”
“Oh, that won’t work,” says the woman.
“Why not?” asks the man.
“Well,” she says, “I’m not the mother — I’m the aunt.”