median
don steward
mathematics teaching 10 ~ 16

Tuesday, 1 June 2010

estimating II















please estimate:
  1. the area of the Sahara desert in square miles?
  2. a maximum speed for a Cheetah to run?
  3. the number of litres in an average bath?
  4. words to a daily newspaper (one with quite a few words in)?
  5. the length of the largest recorded whale?
  6. a very hot oven's temperature?
  7. times a spot on a car tyre touches the ground in a km?
answers:
  1. 3 million (area of UK = 94, 251 sq miles, Sahara = 31.83 UK)
  2. 70 mph
  3. 140 litres
  4. 100, 000 words
  5. 29m
  6. 260 degrees C
  7. 500 (an interesting calculation, diameter seems to be around 73.5cm)

No comments: