The Ace was in position 3. (The only possible arrangements were QKAJ and QJAK)
53.
Nelson was born on a Friday. (The Gregorian calendar had been corrected in line with today's rules in 1752.)
54.
My friend was 49. (It was required to find the two sets of numbers 5, 10, 49 and 7 ,7, 50; both totalling 64. And then, since the children were not twins, it must have been the first set.)