### Aptitude – Shortcuts for Addition and Subtraction

Addition is one of the four basic operations of arithmetic, with the others being subtraction, multiplication and division. The addition of two whole numbers is...

Aptitude Shortcuts

Addition is one of the four basic operations of arithmetic, with the others being subtraction, multiplication and division. The addition of two whole numbers is...

Manohar Veera
December 26, 2016

Aptitude Shortcuts

Multiplication of whole numbers is equivalent to a repeated addition; that is, the multiplication of two numbers is equivalent to adding as many copies of one...

Manohar Veera
December 26, 2016

Aptitude Shortcuts

Shortcut 99: nCr=n!/[r!(n-r)!] Question: In how many ways 2 shirts and 3 pants can be selected from 5 shirts and 7 pants? Answer: Selecting...

Manohar Veera
September 2, 2016

Aptitude Shortcuts

Shortcut 95: Repeated elements n!/(a!*b!) Question: In how many ways the letters of the word “ENVIRONMENT” can be arranged? Answer: n = 11 Let,...

Manohar Veera
September 1, 2016

Aptitude Shortcuts

Shortcut 91: Events Dependent=multiplication Independent =addition Question: There 3 busses from city A to city B and there are 5 busses from city...

Manohar Veera
September 1, 2016

Aptitude Shortcuts

Shortcut 87: Using the odd days Question: Find the day of birth of MS Dhoni (7 July, 1981), if 31 Dec 1999 is Friday...

Manohar Veera
August 31, 2016

Aptitude Shortcuts

Shortcut 85: Using tanƟ Ɵ tan 0 0 30 [latex]1/\sqrt3 [/latex] 45 1 60 [latex] \sqrt3[/latex] 90 ...

Manohar Veera
August 31, 2016

Aptitude Shortcuts

Shortcut 82: Maximum number of items per group Take HCF Question: There are 40, 45 and 50 balls in three different colors. They have...

Manohar Veera
August 30, 2016

Aptitude Shortcuts

Shortcut 77: Divisibility test Divisibleby Rule 2 Last digit of a number should be 0,2,4,6, or 8 3 Sum of the digit should be divisible...

Manohar Veera
August 30, 2016

Aptitude Shortcuts

Shortcut 75: Simple interest [latex]SI=\frac{PNR}{100}[/latex] P = Principle amount invested or borrowed R = Rate of interest per term N = Number of terms Term...

Manohar Veera
August 29, 2016