Two numbers add up to 739. Find the smallest difference between the two numbers. Write down the two numbers.
The chairs in a community centre were arranged in rows such that there were exactly
12 chairs in each row. For a concert, Mr Tan brought in 3 more chairs into the
hall and rearranged all the chairs. There are now exactly 9 chairs in each row
and 11 more rows than before. How many chairs were there in the community
centre for the concert?
There were 3072 files in an office. The number of blue files were 3
times the number of red files. An equal number of blue files and
red files were given away to charity. In the end, the number of
blue files were 4 times the number of red files. How many red files
were given away?