APTITUDE TEST
& PREPARATION
FORMULAE:
(1)
AGE:
Important
formulae on “Ages”:
(1)
If the current age is X, then n times the age
is nX.
(2)
If the current age is X, then age n years
later/hence = X+n
(3)
If the current age is X, then age n years ago
= X-n
(4)
The ages in ration a:b will be ax and bx.
(5)
If the current age is X, 1/n of the age is
X/n.
Example:
1(1) In 4 years, Raj father age twice as raj. Two years ago,
raj mother age twice as raj. If raj is 32 years old in eight years from now, what is the age of Raj
mother and father?
Explanation:
Raj Present age = 32-8
= 24.
After 4 years, Raj age is
28.
Raj father age is 28 * 2 =
56.
His
father present age is 52.
Two years age, Raj age is
22.
Raj mother age is 22 * 2 =
44.
Her
present age is 46.
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