Categories

## [Smart Math] Arithmetic Problem 27

Here’s and example of a SMART MATH problem for ARITHMETIC. ### Problem

How many integer solutions exists for the equation $\left| y-\sqrt{(y+2)^{2}-9} \right|=5$? $\left| y-\sqrt{(y+2)^{2}-9} \right|=5$

1. 0
2. 1
3. 2
4. 3
5. 4

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Categories

## [Speed Math] MULTIPLYING WITH 12

Here’s an example of a SPEED MATH shortcut for MULTIPLYING WITH 12 : (Mul) Nx12 from the MULTIPLICATION category. ### When can I use this method?

For multiplying any number with 12.

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### Notes –

1. There is no real need to add the zero if you can remember to perform same steps for all the digits of the number (including the first and the last).
2. Make sure to take care of the carryovers as you add the neighboring digits.

### Related Shortcuts –

Multiplying with 6: (Mul) Nx6

Multiplying with 7: (Mul) Nx7

Multiplying with 11: (Mul) Nx11

Multiplying with 13: (Mul) Nx13

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Categories

## [Speed Math] DIVIDING 2-DIGIT NUMBER BY 9

Here’s an example of a SPEED MATH shortcut for DIVIDING 2-DIGIT NUMBER BY 9: (Div) Nd9(2d) from the DIVISION category. ### When can I use this method?

For dividing any 2-digit number by 9.

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### Notes –

1. When the sum of the 2 digits is ≥ 9, further divide the sum using this method until you get the sum < 9. Add each Quotient you get along the way to get the final Quotient.
2. If the sum of the 2 digits is = 9, add 1 to the Quotient and the Remainder becomes 0.

### Related Shortcuts –

None

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Categories

## [Speed Math] MULTIPLYING WITH 999

Here’s an example of a SPEED MATH shortcut for MULTIPLYING WITH 999 : (Mul) Nx999 from the MULTIPLICATION category. ### When can I use this method?

For multiplying any number with 999.

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### Notes –

1. The separator should be inserted before the hundred’s (100’s) digit.
2. The complement of a number is what you need to add to it to make it up to some specified total – in this case 1000.

### Related Shortcuts –

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Categories

## [Math Puzzle] 3 Digit numbers with even digits

### Puzzule

How many three digit numbers are there in which all the digits are even??

Categories

## [Math Puzzle] Largest Number

### Puzzule

What is the largest number you can make using numbers 5, 1 , 9 and 2 only once? (Psst…. it’s not that easy… there is a catch)

Categories

## [Math Puzzle] Total score of opponent?

### Puzzule

A team played 10 games and scored 1, 2 3, 4 , 5, 6, 7 8, 9 and 10 points. They lost by 1 point in exactly 5 games. In each of the other games they scored two times the points of its opponent. What is the total score of the opponent in all 10 games?

Categories

## [Math Puzzle] What come next in the sequence?

### Puzzule

What comes next in the sequence?

0

10

1110

3110

132110

13123110

??

Categories

## [Math Site Review] APLUS CLICK.COM-MATH AND LOGIC PROBLEMS This post is part of LazyMaths’ Math website review series. Dedicated purely to help math students, the review highlights tangible learning that the website offers to its visitors and users. If you would like to have your website considered for review, drop us an email – math(at)lazymaths(dot)com.

### Review in a Tweet –

Develop logical reasoning and creative thinking

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### Tell me about it –

This website helps students become creative problem solvers in math. This website has  2250 problems, starting from the easy to the extremely difficult. Hundreds of problems in practical problems and, brainteasers, and short math situations are included.  Also, A+ Click ‘s problems have an illustration included to help the problem solver visualize the model. All problems can be solved within one minute and without using a calculator. The test adapt to the student’s ability. Tests concentrate on understanding, spatial reasoning, and problem solving rather than math rules and theorems. Beautiful site. Check it out!

### What’s on the website?–

Aplusmathclick.com offers the following sections in math:

• Arithmetic
• Algebra
• Geometry
• Analysis
• Logic
• Applied Math
• Exit  Exam
• Everyday Math
• Olympiad Math
• Funny Math
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• Ipad eBooks

### What’s the best part about this website?

The best part of this website is that it’s all free. No ads, and no fees!