Anita had to do a multiplication. Instead of taking 35 as one of the multipliers, she took 53. As a result, the product went up by 540. What is the new product? (CAT 2001)
Ans: (d)
53x - 35x = 540; ⇒ 18x= 540 or x = 30; Therefore, new product=53×30=1590.