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4 years ago, Aditya's age was twice Anvesh's age. 4 years hence,
Aditya's age will be 4/3 times the age of Anvesh. Find Aditya's present age.

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TCS Other Question

The fundamental theorem of arithmetic states that every natural number greater than 1 can be written as a unique
product of prime numbers.
Now what is the smallest number by which 3380 must be divided in order to make it into a perfect square?
find x in the series
3, 15, x, 51, 53,159,161