PREPARATORY QUESTIONS

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➤

NUMBER SEQUENCES

PREPARATORY SET-13

Direction (Qs.1 to 5): There are five 3-digit numbers as given below and digits are counted from left to right, unless specifically mentioned.

 

847   742   989   628   516

 

Question No : 1

If in each number first two digits are replaced by their difference. The largest number is obtained from which number?

(1) 847

(2) 516

(3) 989

(4) 628

(5) 742

Question No : 2

If one is subtracted from the last digit of each of the numbers, in how many numbers thus formed will the last digit be a perfect square?

(1) None

(2) One  

(3) Two

(4) Three

(5) More than three

Question No : 3

If first and last digits are reversed and then numbers are arranged in descending order, which number will be second from left?

(1) 628

(2) 989

(3) 516

(4) 847

(5) 742

Question No : 4

If in each number the position of the first and second digits are interchanged. Which number will be the third largest?

(1) 847

(2) 989

(3) 742

(4) 628

(5) 516

Question No : 5

How many numbers are there which are divisible by 3, if two is added to the last digit of each number?

(1) None

(2) One

(3) Two

(4) Three

(5) Four