PREPARATORY QUESTIONS

NUMBER SEQUENCES

PREPARATORY SET-91

Directions (Qs.1 to 5): Following questions are based on the five three digit number given below:

 

761    548    392    645    249

 

Question No : 1

If all the numbers are arranged in descending order from left to right, which of the following will be sum of all the three digits of the number which is second from the right?

(1) 15

(2) 18

(3) 14

(4) 17

(5) 21

Question No : 2

What will be the resultant if second digit of the highest number is divided by first digit of the lowest number?

(1) 1.5

(2) 2

(3) 4

(4) 9

(5) 3

Question No : 3

If ‘1’ is added to the first digit of every odd number and ‘1’ is subtracted from first digit of every even number, what will be the difference between the highest number and the lowest number thus formed?

(1) 569

(2) 413

(3) 453

(4) 512

(5) 469

Question No : 4

If in each number all the digits are arranged in descending order from left to right within the number, how many odd numbers will be formed?

(1) None

(2) One

(3) Two

(4) Three

(5) Four

Question No : 5

The positions of the first and the third digits of each of the numbers are interchanged. What will be the difference between the first and the last digits of the second highest number thus formed?

(1) 9

(2) 2

(3) 4

(4) 6

(5) 3