Posts Tagged ‘Averages’
Here’s and example of a SMART MATH problem for AVERAGES.

Problem
The average age of 40 boys of a class is 12 years. When 10 new boys are admitted, the average is increased by 0.1 year. What is the average age of the new boys?
- 12.1 years
- 12.4 years
- 12.3 years
- 12.5 years
- 13.0 years
Here’s and example of a SMART MATH problem for AVERAGES.

Problem
In a class of 40, there are 10 boys at the age of 12 years, 12 at the age of 12.5 and the rest at the age of 13. The average age of all boys in the class is ___________ years.
- 12.1
- 12.2
- 12.5
- 12.6
- 12.7
Here’s and example of a SMART MATH problem for AVERAGES.

Problem
In an exam, the average marks obtained by a student in English, Algebra, Geometry and Drawing were 50. His average marks in Algebra, Science, Social Studies and Craft were 70. If the average marks in all 7 subjects were 58. What is his Algebra score?
- 50
- 52
- 60
- 74
- 96
Here’s and example of a SMART MATH problem for AVERAGES.

Problem
In a class of 80 students, there are 50 girls and 30 boys. The average weight of the class is 50 lbs. If the average weight of boys is 55 lbs, what is the average weight of girls?
- 45 lbs.
- 47 lbs.
- 53 lbs.
- 46 lbs.
- 51 lbs.
Here’s and example of a SMART MATH problem for AVERAGES.

Problem
What is the Geometric mean of 24, 27 and 72?
- 29
- 30
- 36
- 42
- 54
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Welcome to Smart Math
Here, you will find Math problems solved using some of the most revolutionary techniques using which, you will get to the answer in less than 1/4th of the usual time.
These techniques will help anyone learn how to simply attempt a Math problem and get the right answer without actually solving it while saving a lot of time and eliminating mistakes.
Smart Math is based on the concepts of approximation, elimination and substitution.
Techniques are freshly pressed in MATH PRESS almost daily, but here you can find easy to navigate quick links to all of them.
SMART MATH PROBLEMS
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Algebra - for all Smart Math problems on Algebra
Arithmetic - for all Smart Math problems on Arithmetic
Averages - for all Smart Math problems on Averages
Geometry - for all Smart Math problems on Geometry
Percentages - for all Smart Math problems on Percentages
Ratio Proportion – for all Smart Math problems on Ratio Proportion
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SPEED MATH SHORTCUTS
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Multiplying Numbers with Common Initial digits : (Mul) FDSdx
Multiplying Numbers with Common Last digits : (Mul) LDSdx
Multiplying Numbers near 10 : (Mul) Nr10
Multiplying Numbers near 100 : (Mul) Nr100
Multiplying Numbers near 1000 : (Mul) Nr1000
Multiplying with 11 : (Mul) Nx11
Multiplying with 12 : (Mul) Nx12
Multiplying with 13 : (Mul) Nx13
Multiplying with 25 : (Mul) Nx25
Multiplying with 5 : (Mul) Nx5
Multiplying with 6 : (Mul) Nx6
Multiplying with 7 : (Mul) Nx7
Squaring 2-digit Number : (Sq) 2D
Squaring 3-digit Number : (Sq) 3D
Squaring 2-digit Numbers ending with 1 : (Sq) LD1d2
Squaring 2-digit Numbers ending with 4 : (Sq) LD4d2
Squaring Numbers ending with 5 : (Sq) LD5dx
Squaring 2-digit Numbers ending with 6 : (Sq) LD6d2
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