Major Elements of Numerical TestsBut numerical tests are not meant to measure your computational skills... ...they focus upon your analytical abilities! It means you can score well even when you are not fully skilled but possess sharp analytical mind. The numeric aptitude tests are designed in the following major areas. Operations of Numbers
You are offered various number problems which use different symbols. You need to understand these general symbols before attempting any numerical test. They are just a few…
≠ is not equal to > is greater than (5 > 4) < is lesser than (4 < 5) ≥ is greater than or equal to ≤ is lesser than or equal to : and :: to the ratio to √ square root of (√16 = 4) |x| absolute value Operations with Complex NumbersComplex numbers are really complex. They contain two parts; real and imaginary. While attempting a numeric aptitude test problem, you should handle the both parts effectively.1- Addition of Complex Numbers To add two complex numbers in numerical tests, you have to add their real parts and imaginary parts separately. Thus, (a+b) + (c+d)= (a+c) +i(b+d) For example: (2+i) + (5+3i) = 7+4i This way you have added two real number (2+5) and imaginary numbers (i+3i) separately.
2- Subtraction of Complex Numbers To subtract one complex number from another complex number, you have to subtract real and imaginary parts of the second complex number from the real and imaginary parts of the first complex numbers, respectively. This way, (a+ib)-(c+id) = (a-c) + i(b-d) For example: (2+3i) (-4+7i) = -8-21-12i+4i =-29+2i 3- Division of Complex Number In numerical tests, you may be offered problems which involve division of complex numbers. However, before knowing the process, you need to know the concept of conjugate of a complex number. If Z = x+ iy then The conjugate of Z is equal to x-iy. When you want to calculate a+ib/c+id, you will have to multiply the numerator and denominator by the conjugate of the denominator. Thus… a+ib/c+id = (a+ib)(c-id)/(c+id)(c-id) = (ac+bd) + i(bc-ad)/c+d For example... 2+i/1+3i = (2-i)(1-3i)/(1+3i)(1-3i) = 2-3-i-6i/1+9 = -1/10-7i/10 4- Multiplication of Complex Number When you multiply the complex numbers, the numbers multiplied are called the factors of the product and the result of the operation is called the product. For example, the numbers 4 and 4 are the factors of 16. Roman SystemUnder the Roman System of numbers you represent real numbers with roman symbols. For example, you write I for 1, V for 5, X for 10, L for 50, C for 100, D for 500 and M for 1000. A smaller number placed in left of these numbers indicates a subtraction and on the right side denotes an addition.While performing division operations, the number which you divide is called the dividend. The number which divides is called the divisor. The number which tells how many times the divisor is contained in a dividend is called the remainder. When there is no remainder, the division is called exact division. Basic AlgebraAny expression which connects variables and constants by algebraic operations of addition, subtraction, multiplication, division, and root extraction is called an algebraic expression. For example:√x + 1/√x or 4x + 2x +8 ...are algebraic expressions. You are required to use algebraic methods to investigate, model and interpret patterns and functions which involve numbers, shapes, data and graphics in the given problems. You are also required to know basic order of operations to carry out multiplications, divisions, additions and subtractions. You should learn what are Greatest Common Divisor (G.C.D), Least Common Multiple (L.C.M), exponents etc. GeometryMeasurementsYou can find questions about measurements in almost all numerical tests. You are required to use a variety of tools and techniques of measurement. The problems may include time, space and weight as measurement units. Techniques of dimensional analysis may also help you to find out correct solutions of tricky questions.Statistics and ProbabilityMost of the numerical tests focus upon the questions which involve a lot of statistical data and probabilities. You are required to analyze any given situation and arrive to the conclusion with the help of your math reasoning. You should have some concept of the procedures which involve statistical data collection, organization and estimations to draw your inferences.Home Site Map Numerical Tests, Number Values and Types Sample Math Aptitude Test Questions IQ Numerical Test Tips Algebra Aptitude Tests Algebra Test and System of Equations
... in Hot MLM Career? Beware Of...!  Click/Download Free Before You Lose! Share Your Thoughts!We find value in differences between learning, interpreting and overall opinions. Please share your thoughts freely about this topic, but always remain respectful. Thank you for your contribution.
Grab this swicki from eurekster.com
|
