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Old 12-18-07, 08:17 AM   #1 (permalink)
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Mental Quick conversions:

Another stupid but simple conversion:
For Km/h to MPH:


Half the speed four times and multiply the result by 10

160Km/h = 80 = 40 =20=10 x10 = 100 mph.

For MPH TO km/h
Divide by 10 and double it 4 times.

Lbs to Kg:
Half it and knock of 10%
Kg to Lbs:
Double it and add 10%.

Any more???
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Old 12-18-07, 08:59 AM   #2 (permalink)
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Re: Mental Quick conversions:

inch to cm divide inch by 4 then multiply by 10 (4 inch = 4/4*10 = 10cm)

6/10 is fair estimate Miles to km (60miles 60/6 * 10 = 100km)

Yards to meters 1 meter = 1.1 yards (or 40 inches) or the height of our favourite car!

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Old 12-18-07, 09:07 AM   #3 (permalink)
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Re: Mental Quick conversions:

Liters x 61 = Cubic Inches
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