PROBLEMS ON NUMBERS ; DESCRIPTION
In this section, questions involving a set of numbers are put in the form of a puzzle. You have to analyse
the given conditions, assume the unknown the numbers and form equations accordingly, which on
solving yield the unknown numbers.
AVERAGE ; IMPORTANT FACTS AND FORMULAE
I. Average = [Sum of observations / Number of observations]
II. Suppose a man covers a certain distance at x kmph and an equal distance at y kmph. Then, the
average speed during the whole journey is [2xy / x + y] kmph.
In this section, questions involving a set of numbers are put in the form of a puzzle. You have to analyse
the given conditions, assume the unknown the numbers and form equations accordingly, which on
solving yield the unknown numbers.
AVERAGE ; IMPORTANT FACTS AND FORMULAE
I. Average = [Sum of observations / Number of observations]
II. Suppose a man covers a certain distance at x kmph and an equal distance at y kmph. Then, the
average speed during the whole journey is [2xy / x + y] kmph.
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