![]() In 1966, mathematician Paul Cooper theorized that the fastest, most efficient way to travel across continents would be to bore a straight hollow tube directly through the Earth, connecting a set of antipodes, remove the air from the tube and fall through.The angle rounded to whole degrees for which a rainbow appears (the critical angle).42 is the atomic mass of one of the naturally occurring stable isotopes of calcium.42 is also ten factorial divided by the number of seconds in a day (i.e.42 is the number of ways to arrange the numbers 1 to 9 in a 3x3 matrix such that the numbers in each row and column are in ascending order.42 is a Harshad number in base 10, because the sum of the digits 4 and 2 is 6 (4 + 2 = 6), and 42 is divisible by 6. ![]() ![]() 42 ( forty-two) is the natural number that follows 41 and precedes 43.įorty-two (42) is a pronic number and an abundant number its prime factorization ( 2 × 3 × 7. ![]()
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