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(#M40155014) ELITMUS Numerical Ability question APTITUDE Keep an EYE

How many 3 digits number are there which sum of digits is equal to 16.

Asked In Elitmus Tikendra (9 years ago)

Unsolved Read Solution (12)

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Read Solution (12) :

ANUP KUMAR  (9 years ago)

100-200=4;
200-300=5;
---------
---------
700-800=10;
800-900=9;
900-999=8;
Total= 66

Is this solution Helpfull? Yes (16) | No   

Pritiranjan swain  (9 years ago)

nos end with 9=7
nos end with 8=8
nos end with 7=9
nos end with 6=9
nos end with 5=8
nos end with 4=7
nos end with 3=6
nos end with 2=5
nos end with 1=4
nos end with 0=3
total = 66

Is this solution Helpfull? Yes (9) | No   

Rahul Bhave  (9 years ago)

Combination of numbers
9 7 0 = 4
9 6 1 = 6
9 5 2 = 6
9 4 3 = 6

8 8 0 = 2
8 7 1 = 6
8 6 2 = 6
8 5 3 = 6
8 4 4 = 3

7 7 2 = 3
7 6 3 = 6
7 5 4 = 6

6 6 4 = 3
6 5 5 = 3

Total = 66

Is this solution Helpfull? Yes (5) | No (2)  

Yamini Kant Mahato  (9 years ago)

The correct ans. is 135

Is this solution Helpfull? Yes (2) | No (5)  

Debidatta Rautaray  (9 years ago)

66

Is this solution Helpfull? Yes (1) | No (1)  

Debidatta Rautaray  (9 years ago)

66

Is this solution Helpfull? Yes (1) | No (1)  

NAVEEN KUMAR  (9 years ago)

https://en.wikipedia.org/wiki/List_of_perfect_numbers

Is this solution Helpfull? Yes (1) | No (4)  

prateek  (9 years ago)

let me simplify this for u guys..first exclude the age of youngest one..i,e 6*30 + 23(remaining) -42(reducing the age of remaining 6 person) we will get 161(sum of ages of other 6 people when the young one was born)
161/6 =26.8 is the average of other 6 persons when the young one was born!!

Is this solution Helpfull? Yes (1) | No   

rituraj  (9 years ago)

Use permutation concept
(556)=3!/2! =3 [because 2 no,s are common] [556,655,565]
(574)=3!=6 [574,547,475,457,754,745]
Similarly,
(583)=3!=6
(592)=3!=6

(664)=3!/2!=3
(673)=3!=6
(682)=3!=6
(691)=3!=6

(772)=3!/2!=3
(781)=3!=6
(790)=4 [because 079 and 097 are not 3 digit numbers)
Similarly,
880,808 =2

Total=57

Is this solution Helpfull? Yes | No (3)  

Mithilesh Times  (9 years ago)

66 is correct answer.

Is this solution Helpfull? Yes | No (1)  

Preetam  (9 years ago)

First number =169
second number =178
Third number =187

last number=970

A.P. With d=9

an = a +(n-1).d gives n=90

so its 90. Correct .

Is this solution Helpfull? Yes | No (3)  

shashank  (9 years ago)

84 is the answr

Is this solution Helpfull? Yes | No (1)  

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