state gov UPSSSC Assistant Accountant Mock Test Series Quantitative Aptitude Number System Quick Math
The half-life of a radioactive element is 2.5 minutes. If there were 150 grams of the element remaining after 15 minutes, what was the quantity of the element that was there at the beginning of the period?
1
9900 grams
2
9000 grams
3
9300 grams
4
9600 grams