His mother went to Delhi yesterday. Her object was to visit the Red fort.

The present age of son is half of the present age of his mother. Ten years ago, his mother’s age was thrice the age of her son. What is the present age of the son? a. 20 years b. 25 years c. 30 years d. 40 years

Hema viewed a certain object and found that it is not clearly visible to her. It was found that the image was formed by his eye lens 3 cm away from the pupil of his eye. Hema can correct this defect in her vision by using

The present ages of a mother and her son are I the ratio 11:5. When the son becomes a sold as his mother is now, then the ratio of his fathers age to that of his mother is 19:17. When the son becomes as old as his father is now, then the sum of his fathers age and his age will be 170 years. What is the fathers present age? 52 y e a r s b. 60 y e a r s c. 65 y e a r s d. 70 y e a r s