The number that comes in place of ? is:
Match the books with their authors:
If A, B, C, D, E, F, G, H, I, J represent 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 then (AB + CD) - GH = ?
What is the respective ratio of the number of teachers who teach Mathematics and the number of teachers who teach Hindi?