HOW TO CLEAR THE APTITUDE TEST IN WRITTEN EXAM

(i) The face value of a digit in numeral is its own value , at what ever place it may be

EX. In the numeral 6872 , the face value of the 2 is 2 , the face value of the 7 is 7 , the face value of 8 is 8 and the face value 6 is 6

(ii) In the given numeral :

place value of the unit digit = (unit digit )* 1

the place value of the tens digit = (tens digit )*10

place value of the hundred digit = (hundred)* 100 and so on

EX. In the numeral 70984 we have

Place value of 4 = 4*1=4

place value of the 8 = 8*10 =80

place value of the 9 = 9*100=900

place value of the 0=0

place value of the 7 =7*10000=70000

Even numbers :- A counting number divisible by 2 is known as even no.
for e.g 0,2,4,6,8,10 so on these are the even numbers ..

Odd numbers :- A counting number which are not divisible by 2 are known as odd number

for e.g 1,3,5,7,9,11 so on are odd numbers

A counting number id called a prime no. if it has exactly two factors namely itself and 1

EX. 2,3,5,7,9,11,13.17,19,23,29.31.37.41.43.47.53.59.61,67,71,73,,79,83,,89,97,

TEST FOR A NUMBER TO BE PRIME

Let p be the number and n be the smallest counting number such that (n^2>p) n square is greater then & equal to the p

now test p is divisible by any of prime no. less than or equal to the n

if yes than p is not prime otherwise p is prime ..

EX.

137 is prime no . or not prime no.

12^2 is less than 137
prime no. less than 12 are 2,3,5,7,9,11
none of these are divisible by the 137
.'. 137 is a prime number ..

Monday, 5 November 2012