Category: Aptitude Shortcuts
Aptitude – Shortcuts for Addition and Subtraction

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 the total amount ...

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Aptitude – Shortcuts for Multiplication

Aptitude – Shortcuts for Multiplication

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 of them, the ...

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Shortcut of Combination and Probability

Shortcut of Combination and Probability

Shortcut 99:    nCr=n!/ Question: In how many ways 2 shirts and 3 pants can be selected from 5 shirts and 7 pants? Answer: Selecting 2 shirts out of 5 = 5C2 = 5!/ = 10 Selecting 3 ...

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Shortcut of Permutation-2

Shortcut of Permutation-2

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, a = 2 (E is repeated twice) ...

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Shortcut of Permutation-1

Shortcut of Permutation-1

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

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Shortcut of Calendar and Clocks

Shortcut of Calendar and Clocks

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

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Shortcut of Heights and Distances

Shortcut of Heights and Distances

Shortcut 85: Using tanƟ Ɵ                                tan 0                                    0 30                            1/\sqrt3 45                                  ...

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Shortcut of LCM and HCF

Shortcut of LCM and HCF

Shortcut 82: Maximum number of items per group     Take HCF Question: There are 40, 45 and 50 balls in three different colors. They have to be arranged in boxes such that all the ...

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Shortcut of Number system

Shortcut of Number system

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

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Shortcut of Simple and Compound Interest

Shortcut of Simple and Compound Interest

Shortcut 75: Simple interest SI=\frac{PNR}{100} P = Principle amount invested or borrowed R = Rate of interest per term N = Number of terms Term = duration for which interest is ...

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