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Don’t Solve are Smart Math problems attempted without solving. By using simple logic and smart techniques, answers to seemingly complex Math problems can be easily found in a matter of seconds… without actually solving the problem! Don’t believe it? Read below to see it for yourself!

Anyone can benefit by learning better Math. Whether you are a student, a parent, a teacher or simple a casual Internet surfer, this will change your outlook for Math – guaranteed! Whether you are taking any Math test or even training others for a Math test, these Math techniques will boost your confidence as well as the score. Don’t take GRE, GMAT, SAT or any other similar test without LazyMaths.com. Our students have reported significant increase in their quant scores in these tests.

Know more about Don’t Solve here

Every week we publish 1 FREE Don’t Solve problem. To learn all the hundreds of math techniques, sign up with LazyMaths.com. When you sign up and become a member, you can access math techniques in Algebra, Geometry, Ratio Proportion, Averages, Time Speed & Distance and many more areas. You can also interact with other users, leave comments, ask questions and rate every problem!

Here is this week’s FREE Don’t Solve problem…

Problem

Find the value of ‘a’ in .

a. 4

b. 2

c. 1

d. 3

e. 0

Usual Method

() = 12

= 1

a = 0

(Ans: e)

Estimated Time to arrive at the answer = 75 seconds.

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Smart Technique

Simply look at the options and start substituting the values in the expressions and just check which one satisfies the equation Also, remember to start substituting with the value that is easiest of all to substitute. In this case, for example, the easier values are ‘0’ and ‘1’. You would notice that ‘0’ satisfies the equation as follows:

Hence option ‘e’.

(Ans: e)

Estimated Time to arrive at the answer = 10 seconds.

Tell us what you think about the techniques used to solve this problem. Does this help in making math easy? Save time?

Feel free to suggest any new shortcuts or share your comments. If you like this site, share it with your friends.

NOTE: We publish one FREE problem every Wednesday. It auto expires after 1 month. Become a Member to learn hundreds of shortcuts and techniques.

Don’t Solve are Smart Math problems attempted without solving. By using simple logic and smart techniques, answers to seemingly complex Math problems can be easily found in a matter of seconds… without actually solving the problem! Don’t believe it? Read below to see it for yourself!

Anyone can benefit by learning better Math. Whether you are a student, a parent, a teacher or simple a casual Internet surfer, this will change your outlook for Math – guaranteed! Whether you are taking any Math test or even training others for a Math test, these Math techniques will boost your confidence as well as the score. Don’t take GRE, GMAT, SAT or any other similar test without LazyMaths.com. Our students have reported significant increase in their quant scores in these tests.

Know more about Don’t Solve here

Every week we publish 1 FREE Don’t Solve problem. To learn all the hundreds of math techniques, sign up with LazyMaths.com. When you sign up and become a member, you can access math techniques in Algebra, Geometry, Ratio Proportion, Averages, Time Speed & Distance and many more areas. You can also interact with other users, leave comments, ask questions and rate every problem!

Here is this week’s FREE Don’t Solve problem…

Usual Method

Let ‘m’ be the fraction be the amount of work done by 1 man in 1 day and ‘w’ be the fraction of work done by 1 woman in 1 day.

3m + 6w = 1/4

12 m + 24 w = 1                                 …… Eq. 1.

Similarly,

5m + 4w = 1/3

15m + 12w = 1                                   …… Eq. 2.

Solving both equation 1 and 2 simultaneously we get

18m = 1 and 72w = 1

m = and w =

8w + 1m =

Hence, 6 days.

(Ans: a)

Estimated Time to arrive at the answer = 120 seconds.

Tell us what you think about the techniques used to solve this problem. Does this help in making math easy? Save time?

Feel free to suggest any new shortcuts or share your comments. If you like this site, share it with your friends.

NOTE: We publish one FREE problem every Wednesday. It auto expires after 1 month. Become a Member to learn hundreds of shortcuts and techniques.

Don’t Solve are Smart Math problems attempted without solving. By using simple logic and smart techniques, answers to seemingly complex Math problems can be easily found in a matter of seconds… without actually solving the problem! Don’t believe it? Read below to see it for yourself!

Anyone can benefit by learning better Math. Whether you are a student, a parent, a teacher or simple a casual Internet surfer, this will change your outlook for Math – guaranteed! Whether you are taking any Math test or even training others for a Math test, these Math techniques will boost your confidence as well as the score. Don’t take GRE, GMAT, SAT or any other similar test without LazyMaths.com. Our students have reported significant increase in their quant scores in these tests.

Know more about Don’t Solve here

Every week we publish 1 FREE Don’t Solve problem. To learn all the hundreds of math techniques, sign up with LazyMaths.com. When you sign up and become a member, you can access math techniques in Algebra, Geometry, Ratio Proportion, Averages, Time Speed & Distance and many more areas. You can also interact with other users, leave comments, ask questions and rate every problem!

Here is this week’s FREE Don’t Solve problem…

Usual Method

A = 4/5 B                                   B = 3/4 C

5A = 4B                                      4B = 3C

A : B = 4 : 5                               B : C = 3 : 4

A        :        B        :        C

4        :        5

3        :        4

12      :        15      :        20

Also, 12 + 15 + 20 = 47 lbs

Hence, A = 12 lbs, B = 15 lbs and C = 20 lbs.

(Ans: c)

Estimated Time to arrive at the answer = 60 seconds.

Smart Technique

The first step is to eliminate those options whose sum 47. Thus option ‘e’ is eliminated as sum of 10 + 20 + 18 = 48.

The next step is to identify the metal with maximum or minimum quantity. Because A = 4/5 B and B = 3/4 C; the metal C is of maximum quantity and A is of minimum quantity. Thus options ‘a’ and ‘d’ are eliminated. This leaves us with options ‘b’ and ‘c’ only. Since, A = 4/5 B; 5A = 4B.

For option ‘b’, 5 x 12 4 x 13, hence ‘b’ is also eliminated. Thus answer is option ‘c’.

(Ans: c)

Estimated Time to arrive at the answer = 15 seconds.

Tell us what you think about the techniques used to solve this problem. Does this help in making math easy? Save time?

Feel free to suggest any new shortcuts or share your comments. If you like this site, share it with your friends.

NOTE: We publish one FREE problem every Wednesday. It auto expires after 1 month. Become a Member to learn hundreds of shortcuts and techniques.

Don’t Solve are Smart Math problems attempted without solving. By using simple logic and smart techniques, answers to seemingly complex Math problems can be easily found in a matter of seconds… without actually solving the problem! Don’t believe it? Read below to see it for yourself!

Anyone can benefit by learning better Math. Whether you are a student, a parent, a teacher or simple a casual Internet surfer, this will change your outlook for Math – guaranteed! Whether you are taking any Math test or even training others for a Math test, these Math techniques will boost your confidence as well as the score. Don’t take GRE, GMAT, SAT or any other similar test without LazyMaths.com. Our students have reported significant increase in their quant scores in these tests.

Know more about Don’t Solve here

Every week we publish 1 FREE Don’t Solve problem. To learn all the hundreds of math techniques, sign up with LazyMaths.com. When you sign up and become a member, you can access math techniques in Algebra, Geometry, Ratio Proportion, Averages, Time Speed & Distance and many more areas. You can also interact with other users, leave comments, ask questions and rate every problem!

Here is this week’s FREE Don’t Solve problem…

Problem

If means ; find the value of 3.124*1.39.

a. 2.41324

b. 3.24026

c. 4.00236

d. 2.41026

e. 2.313456

Usual Method

Substituting the values of ‘x’ and ‘y’ according to the data given, we get

i.e.

= 2.41026

(Ans: d)

Estimated Time to arrive at the answer = 90 seconds as this is a calculation intensive problem.

Smart Technique

Just get to the ‘’ level. Note that the product of these two numbers should be 2+3 = 5 digits after the decimal point. This eliminates option ‘e’.

Also, the product of the last digits is ‘6’ (9 x 4 = 36). Hence, ‘6’ should be the last digit of the answer. This eliminates option ‘a’.

Also, note that 13 x 17 > 200. Hence, the answer should be a number starting with 2.something…

Hence, the answer is option ‘d’.

(Ans: d)

Estimated Time to arrive at the answer = 10 seconds

Tell us what you think about the techniques used to solve this problem. Does this help in making math easy? Save time?

Feel free to suggest any new shortcuts or share your comments. If you like this site, share it with your friends.

NOTE: We publish one FREE problem every Wednesday. It auto expires after 1 month. Become a Member to learn hundreds of shortcuts and techniques.