Body Language

Shoulder Shrug Gesture

• The shoulder shrug is also a good example of a universal gesture that is used to show that a person does not know or understand what you are talking about. It is a multiple gesture that has three main parts: exposed palms, hunched shoulders and raised brow.

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The Ring or 'OK' Gesture

• The 'OK' meaning is common to all English-speaking countries and it means "All correct".

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The Thumb-Up Gesture

• In Britain, Australia and New Zealand the thumb-up gesture has three meanings, it is commonly used by hitch-hikers who are thumbing a lift, it is an OK signal, and when the thumb is jerked sharply upwards it becomes an insult signal, meaning 'up yours' or 'sit on this'. In some countries, such as Greece, its main meaning is 'get stuffed'.

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Congruence (state of agreement)

• We often see a high ranking politician standing behind a lectern with his arms tightly folded across his chest (defensive) and chin down (critical or hostile), while telling his audience how receptive and open he is to the ideas of young people.

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How To Tell Lies Successfully

Solving linear equations in integers

Oranges can be packed in sets of 10 oranges in box type A or 25 oranges in box type B. A carton comprising of 1000 oranges of type a and b is packed. How many different combinations are possible in the number of type A and type B boxes while organizing the oranges?

a. 21	b. 20
c. 19	d. 18

Finding integers solutions is one of the important question that is being asked in the recent exams. We will discuss some interesting methodologies to solve them.
If a system of equations has two variables, we need atleast two equations to solve them.  But what if, we are given only one equation?
Suppose taking my date of birth, my date is multiplied by 31 and month is multiplied by 12 and given the product as 494.  Can you determine my birth date and month?
Take an equation ax+by=k. 
This is in the format of A+B=k. As k is constant, If A increases, B should decrease.  The question is, by how much?  Simple. If "A" reduces by "b" (the coefficient of y), B should increase by "a" (the coefficient of x) and vice versa.
For example, 5x + 3y = 100. One solution for this equation is (20, 0). Now the next solution is (23, -5), (26, - 10) .... or (17, 5), (14, 10), ..... '