The mini-theme for #10 & #11 this week is titled: "Within a Numerical Range". Here we go. The annual Ironman World Championship, the original and most prestigious "Ironman Triathlon", was held last weekend in Kailua-Kona, Hawaii. For how long (in years) has this competition been held? (accept within 7 years)
40 years (accept 33 to 47 years)