What will come in place of the question mark (?) in the following equation, if ‘+’ and ‘–’ are interchanged and ‘$ \times\ $ and $ \div\ $ ’ are interchanged?
$ 4515 \times 5 – 431\div 3 + 821 = ? $

Options
a) 1335
b) 1775
c) 1575
d) 1375

Solution

$ 4515 \times 5 – 431\div 3 + 821 = ? $
change symbol
$ 4515 \div 5 + 431\times 3 – 821 = ? $
903 + 1293 – 821
903 + 472
1375

Correct Answer : d) 1375