For those looking at this thread and wanting additional help for the Mixed Doubles Rainbow Quiz, here are the numbers of the questions involved, where help has already been sought...
1, 5, 6, 8, 9, 10, 11, 13, 16, 17, 18, 20, 22, 24, 25, 26, 27, 28, 29, 30, 31, 33, 34, 36, 39, 40, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 57, 58, 59, 60, 61, 62, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 77, 78, 80, 81, 82, 83, 84, 85, 87, 94, 95, 96, 97, 99 and 100.
The 'hints' for these are detailed on the long 'Mixed Doubles' thread.