In this lesson, we are going to practice few “What should be subtracted from?” questions.
Almost every CTET question paper has questions like this.
Previous Year Questions:
Question #1  What number should be subtracted from the product 1109 × 505 so as to get 505050?
[Mathematics] [CTET201409]


Options 

Answer Explanation  Number = 1109 × 505 – 505050 = 560045 – 505050 = 54995 
Question #2  What should be subtracted from the product 102 x 201 to get 19999?
[Mathematics] [CTET201502]

Options 

Answer Explanation  102 x 201 = 20502 subtract 19999 from 20502 to get 503. 
Question #3  What should be subtracted from the product 3001× 101 to get 300311?
[Mathematics] [CTET201402]

Options 

Question #4  What should be subtracted from 5/7 to get −1?
[Mathematics] [CTET201409]

Options 

Question #5  The hundreds digit of a threedigit number is 7 more than the units digit. The digits of the number are reversed, and the resulting number is subtracted from the original threedigit number. The units digit of the final number so obtained is
[Mathematics] [CTET201409]

Options 

Question #6  The number n is doubled and then y is added to it. The result is then divided by 2 and the original number n is subtracted from it. The final result is
[Mathematics] [CTET201402]

Options 

Question #7  What should be subtracted from (5/7) to get (2/3)?
[Mathematics] [CTET201502]

Options 

Answer Explanation  Subtract (2/3) from (5/7)
=> (5/7) (2/3) => 2/3 – 5/7 => (14 – 15)/21 => 1/21 