Latest TCS Aptitude Question SOLUTION: how many numbers from 283 to 839 have digit 7 in it??

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(#M40021920) TCS Numerical Ability question Keep an EYE

how many numbers from 283 to 839 have digit 7 in it??

Asked In TCS nagashree (10 years ago)

Unsolved Read Solution (16)

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Read Solution (16) :

Krati Agarwal  (10 years ago)

283-299=2
300-399=20
400-499=20
500-599=20
600-699=20
700-799=120
800-839=4
total=206

Is this solution Helpfull? Yes (84) | No (22)  

nagashree  (10 years ago)

283-299=2
300-399=19
400-499=19
500-599=19
600-699=19
700-799=100
800-839=4
total=182

Is this solution Helpfull? Yes (38) | No (26)  

Debdutto Chakraborty  (10 years ago)

Answer is 182

Counting:

from 300 to 399 = 19
from 400 to 499 = 19
from 500 to 599 = 19
from 600 to 699 = 19
from 700 to 799 = 100

From 283 to 299 we have 2 AND from 800 to 839 we have 4

Therefore answer: (19*4)+100+2+4=182

Is this solution Helpfull? Yes (10) | No (11)  

vignesh  (10 years ago)

answer is 201.....
283-300=4
301-400=19
401-500=19
501-600=19
601-700=20
701-800=118
801-839=4..
total 201.

Is this solution Helpfull? Yes (7) | No (15)  

Atanu Mondal  (10 years ago)

283-299=2
300-399=19
400-499=19
500-599=19
600-699=19
700-799=100
800-839=4
total=182

Is this solution Helpfull? Yes (7) | No (8)  

Geetha Chilamakurthi  (10 years ago)

From 283-299 we will get 2 7's
For 300-399 we will get 19 7's.. like that for 400 to 499,500 to 599, 600 to 699 we will get => 2+(4*19)=2+76=78
In 700 series we have 100 7's
so 100+78=178
Again from 800 - 839 4 7's
=> 178+4=182

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

ravi  (10 years ago)

1) 300 to 399 = 19
2) 400 to 499 = 19
3) 500 to 599 = 19
4) 600 to 699 = 19
5) 700 to 799 = 100
6)283 to 299=2
7)800 to 839=4
so req. ans is 182

Is this solution Helpfull? Yes (4) | No (6)  

priyal rastogi  (10 years ago)

ans is 56
counting no.s after 283 we have 7 in 287,297 ie.2 no.s in 200 now in 300's we have 10 such no.s. similarly in 400 again we will have 10 no.s adding them we have 50 no.s between 300 and 800.
now in 200's we calculated 2 such no.s and in 800's we have 4 no.s uptil 839.
so,
50+2+4=56.

Is this solution Helpfull? Yes (3) | No (23)  

sums  (10 years ago)

2+19+19+19+19+119+4 = 201

Is this solution Helpfull? Yes (3) | No (3)  

Sanju  (10 years ago)

total 200 , from 283 to 300 =2 , 300 to 400 = 19, 400 to 500 =19,500 t0 600 =19, 600 to 700 = 19 700 to 119 ,700 to 800 19, and 3 total 200

Is this solution Helpfull? Yes (2) | No (11)  

AKSHAY SINGHAL  (10 years ago)

283-299=2
300-399=20
400-499=20
500-599=20
600-699=20
700-799=120
800-839=4

Is this solution Helpfull? Yes (1) | No (2)  

shantanu jawale  (9 years ago)

283-300=4
301-400=19
401-500=19
501-600=19
601-700=20
701-800=118
801-839=4..
total 201.

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

Sayandeep Jana  (8 years ago)

283-299=2
300-399=19( considering unit digit 7 and 10th place 7)
400-499=19
500-599=19
600-699=19
700-799=100
800-839=4
total=182

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

smith kumar saha  (10 years ago)

189 is the ans

Is this solution Helpfull? Yes | No (3)  

Pulakendu Biswas  (9 years ago)

i think the answer is 56. here have to find no. of numbers which have digit 7 in it. not no. of 7 in between 283 to 839.
283-300: 287,297=2
300-399: 307,317,327,337,347,357,367,377,387,397=10
400-499: same way 10
500-599: same way 10
600-699: same way 10
700-799: same way 10
800-839: 807,817,827,837=4
so total=2+5*10+4=56

Is this solution Helpfull? Yes | No (5)  

gopichand  (7 years ago)

every 100 nums will have 20 7 letter, and in 700 to 799 a total of 120 so total is 2+20+20+20+20+120+4=206

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