Smart Math
January 6, 2012 | 
Author Here’s and example of a SMART MATH problem for ARITHMETIC.
Problem
How many integer solutions exists for the equation 
- 0
- 1
- 2
- 3
- 4
Posted in Arithmetic, Smart Math | 
Tags: Arithmetic, Math Tricks, Mental Math, Smart Math | 
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Posted in Arithmetic, Smart Math | Tags: Arithmetic, Math Tricks, Mental Math, Smart Math | No Comments »
Here’s and example of a SMART MATH problem for ARITHMETIC.
Problem
What is
written in the base system in which 
- 2560
- 4320
- 1220
- 7986
- 3454
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Here’s and example of a SMART MATH problem for ALGEBRA.
Problem
If the sum of money is divided among ‘n’ children, each child will receive $60. If another child is added to the group and the amount is distributed again each child will receive $50. What is the sum of money to be distributed?
- $3
- $30
- $300
- $3000
- Cannot be determined
Here’s and example of a SMART MATH problem for RATIO PROPORTION.
Problem
Two numbers are less than 10 and in the ratio 3 : 1. What is their product?
- 10
- 12
- 14
- 16
- 18
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Here’s and example of a SMART MATH problem for RATIO PROPORTION.
Problem
R can do a piece of work in 20 days and K in 25 days. They work together for 5 days and then K leaves. In how many days would R finish the work?
- 5
- 9
- 10
- 11
- 12
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Here’s and example of a SMART MATH problem for GEOMETRY.
Problem
A rectangular bin 4 feet long, 3 feet wide and 2 feet high is solidly packed with bricks of dimensions 8 inches, 4 inches and 2 inches. Find the maximum number of bricks that can go in the bin.
- 54
- 320
- 648
- 848
- cannot be determined
The Usual Method
The maximum number of bricks that can go in the bin =
(Ans: 3)
Estimated Time to arrive at the answer = 30 seconds.
Using Technique
Since the size of bins is given in feet and that of the bricks is given in inches, we convert feet to inches by multiplying by 12. Thus the answer should be a multiple of 12. Only option ‘3’ is a multiple of 12.
(Note: to find the multiple of 12, find the multiple of 3 as well as 4).
(Ans: 3)
Estimated Time to arrive at the answer = 10 seconds.
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Here’s and example of a SMART MATH problem for PERCENTAGES.
Problem
Two dozen shuttle cocks and four Badminton rackets are to be purchased for a club. The shuttle cocks are priced at 35 cents each and rackets are at $2.75 each. The playground receives a discount of 30% on these prices. What is the total cost of the equipment?
- $7.29
- $11.43
- $13.58
- $18.60
- $19.40
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Here’s and example of a SMART MATH problem for PERCENTAGES.
Problem
A circle graph of a budget shows expenditure of 26.2% for housing, 28.4% for food, 12% for clothing, 12.7% for taxes and the balance for miscellaneous items. What is the percentage share of miscellaneous items?
- 79.3%
- 70.3%
- 68.5%
- 29.7%
- 20.7%
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Here’s and example of a SMART MATH problem for ALGEBRA.
Problem
How much water must be added to 100 cc of a 60% solution of sulphuric acid to reduce it to a 40% solution?
- 20 cc
- 30 cc
- 40 cc
- 50 cc
- 60 cc