• Placement Papers
• /
• Elitmus
• /
• Numerical Ability
• /
• Number System

Elitmus Question Papers:

(#M40030650) ELITMUS Numerical Ability question quant Keep an EYE

A three digit number is such dat (eg 2*3*4=24).how many three digit number are possible which saties this.
A)22
B)18)
c)15

Asked In Elitmus abc (10 years ago)

Unsolved Read Solution (11)

Is this Puzzle helpful?   (3)   (4) Submit Your Solution Number System

Read Solution (11) :

pradeep singh  (10 years ago)

21

as we have to get 24 by multiplication of unit , tens and hundredth digits .
so if 1 is at 100th place then we have 146,164,138,183 only
put 2 at 100th place - 226,262,234,243
3 at 100th place - 324,342,318,381
4 at 100th place - 416,461,423,432
6 at 100th place - 614,641,622
8 at 100th place - 813,831 .
which is total 21 .

Is this solution Helpfull? Yes (49) | No (2)  

vivek priyadarshi  (10 years ago)

Answer is 21.....
24 number is multiple of 3 digit
combinations:
2*3*4=24 combination=3!=6
6*2*2=24 combination=3!/2!=3
1*4*6=24 combination=3!=6
1*8*3=24 combination=3!=6
now sum of combonation=3+6+6+6=21
so Ans is 21.........

Is this solution Helpfull? Yes (8) | No   

SANDEEP KUMAR  (10 years ago)

factors of 24= 1,2,2,3
now we have to form 3 digit numbers whose sum of the digits must be equal to 24.
those numbers would be 423,813,614, 226. now the first three numbers can be arranged in 6 ways and the last number(226) can be arranged in 3 ways as it contains two identical number.
so total arrangement would be 6*3+3= 21(ans)

Is this solution Helpfull? Yes (6) | No (2)  

Priyanka Sonal  (10 years ago)

21 is the correct answer,Mani has done one mistake in i,e 2*2*6 can not be arranged in 6 ways. since there is repetition of 2 thats why it can only be arranged in 3!/2! = 3.
So 6+6+6+3 = 21.

Is this solution Helpfull? Yes (5) | No   

mani  (10 years ago)

24 can be made by 1*3*8=24, 3*2*4=24, 1*6*4=24, 2*2*6=24, and each can be arranged in 6 ways so 6*4=24.. so 24 possible number can be there.

Is this solution Helpfull? Yes (4) | No (4)  

abc  (10 years ago)

can u explain ?

Is this solution Helpfull? Yes (1) | No   

mohit mishra  (10 years ago)

Ans. is 21

Is this solution Helpfull? Yes | No   

abc  (10 years ago)

ya 21 is the right answr .jaldi jaldi mein galat kar diya maine

Is this solution Helpfull? Yes | No   

ravi  (10 years ago)

what abt 1*4*9=36.it also came in elitmus

Is this solution Helpfull? Yes | No   

Trisha   (10 years ago)

@ravi for 36.. 18 is the right answer? m i correct?

Is this solution Helpfull? Yes | No (1)  

T.VIGNESWARA REDDY  (9 years ago)

1*3*5=15 (arranged in 6 ways)
1*6*2=12 arraged 6 ways
2*3*4=24(arranged in 6 ways)
3*2*6=36 .............. so ans is 24 or more option d none of the above

Is this solution Helpfull? Yes | No (6)  

Please Login to Read Solution.