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Question 1
What is 447 × 49?
21903.
21912.
21894.
21921.
Ans: a
This is a multiplication by a number whose units place is 9. Proceed like this: 447 × 49 = 447 × (40 + 9) = 447 × (40 + 10 - 1) = (447 × 40) + (447 × 10) - 447 = 17880 + 4470 - 447 = 21903. The other approach could have been 447 × 49 = 447 × (50 - 1), etc.,
Question 2
A bag contains equal number of coins each of Rs. 1, 5 and 10. What is the total number of coins in the bag, if the total money is Rs. 432?
Question 3
The value of x for which the value of |8x - 32| is minimum is?
Question 4
What is 561 × 9?
5049.
5058.
5040.
5067.
Ans: a
This is a multiplication by 9. Proceed like this: 561 × 9 = 561 × (10 - 1) = 561 × 10 - 561 = 5610 - 561 = 5049. Sometimes, the options can be ruled out by examining the units places, but for simpler cases these shortcuts will help you save time overall.
Question 5
1/8 of a boy's score in Maths exceeds 1/22 of his score in English by 15 marks. What is his score in English, if his total score in English and Maths is 210?
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This Blog Post/Article "Basic Simplification Quiz Set 012" by Parveen (Hoven) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Updated on 2020-02-07. Published on: 2016-05-13