At 62, Delhi-based Saroj Bhattacharya can put a lot of youngsters to shame—she is a serious investor. A mechanical engineer by qualification, she worked for about 25 years in some of the biggest Indian steel companies before calling it quits. "I left that job about a decade ago, when my kids were appearing for their board exams," she says. With investing being her passion, she was able to use her time fruitfully by putting her money to work.