The grid is faster than your head
Six facts about five children is thirty things to keep track of, and nobody holds thirty things. Draw the grid, cross out on the first pass, tick on the second.
Logic
2 posts on this. Written by Mat and Alicia, who prepare pupils for the Buckinghamshire Transfer Test every week in Winslow.
Could be true is not must be true
If a sentence could be false in any way the gaps might be filled in, it is out. Ask 'can I break it?' — and read the last line again, because must and cannot sit next to each other on purpose.