Stock purchased of 250,000 during the year and its closing stock was 20,000 less than its opening stock of 100,000. How much stock was consumed ?

As per simple equation

Opening stock (100,000) + Purchases (250,000) - Closing stock (100,000-20,000=80,000)

Stock worth

100,000

250,000+

80,000-

-----------

270,000

======

270000 is correct answer .........

Stock worth270,000.

Opening  + Purchases - Issuance = Closing balance ( Plain Maths)

or

Opening stock + Purchases - Closing stock = consumption ( Accountants COS way)

Hope this helps

Stock purchased + Difference in Closing and Opening Stocks = Stock Consumed 

250000 + () =270000

it was370000