In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?
The ratio of the present ages of Shreya and her husband is 8 : 9. 9 years from now, ages of her husband and her son will be in the ratio of 9 : 4. If the present age of Shreya is 56 years, then what will be her son’s present age (in years)?
There are five friends I, J, K, L and M. K's income is more than L's income but lesser than M's income. J's income is the least. I's income is lesser than K's income. Whose income is the maximum?