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MATH PUZZLE: Can you replace the question mark with a number?
NUMBERMANIA: Calculate the number 3315 using numbers [8, 8, 7, 3, 98, 572] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
MATH PUZZLE: Can you replace the question mark with a number?

Sir William Siemens

Died 18 Nov 1883 at age 60 (born 4 Apr 1823). Sir (Charles) William Siemens was a German-English engineer and inventor whodevisedthe “regenerative system” of using waste gases to preheat fuel gases, for the open-hearth furnace used in steel manufacturing. He was alsoimportant in the telegraph industry, apioneer in undersea cable.He assisted in the engineering of the London-Calcutta telegraph line (1869), a landmark achievement in communications.His name at birth was Carl Wilhelm Siemens, the younger brother of Ernst Werner Siemens (later ennobled asWerner von Siemens, who founded what is now the multinational Siemens company). Carl first visited England as agent for his brother to introduce an electroplating device. He returned in 1844, stayed, became a naturalized British subject in 1859, and known as Charles William Siemens until knighted as Sir William Siemens a few months before his death.«[NYT obituary gives date of death 18 Nov 1883. EB gives 19 Nov 1883.]

Joe's wife bought a new line...

Joe's wife bought a new line of expensive cosmetics guaranteed to make her look years younger. After a lengthy sitting before the mirror applying the "miracle" products, she asked, "Darling, honestly, what age would you say I am?"
Looking over her carefully, Joe replied, "Judging from your skin, twenty; your hair, eighteen; and your figure, twenty five."
"Oh, you flatterer!" she gushed.
"Hey, wait a minute!" Joe interrupted. "I haven't added them up yet."
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