A father's age was 8 times his son's age 4 years ago. Presently the father's age is 4 times that of his son. Find the present age of the son?

In a family, each daughter has the same number of brothers as she has sisters and each son has twice as many sister as he has brothers. How many sons are there in the family?

If all the faces of a big cube are painted red and it is cut into 64 identical smaller cubes, then the number of colored cubes on two adjacent faces is -

Ram was twelve times as old as his son twenty years ago. Now he is twice as old as his son. What are the present ages of the son and Ram?

How many numbers are there between 1 and 100 which start or end at 2? 

If 6 * 9 – 4 = 58 and 3 * 9 – 7 = 34, then in the expression A * 4 – 9 = 91, what is the value of 'A'?

The ratio of the present age of the two brothers is 1: 2. And 5 years ago this ratio was 1: 3. So what will be the ratio of their age after 5 years.

The sum of the ages of a father and his son is 56 years. After 4 years, the father's age will be 3 times his son's age. Their ages are respectively.