Latest TCS Aptitude Question SOLUTION: How many 5’s will be there in the number 121122123... till 356?

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How many 5’s will be there in the number 121122123... till 356?

Asked In TCS sindhu (10 years ago)

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RAKESH  (10 years ago)

121122123... till 356
121,122,123,124... till 356

121 to 200 => 125,135,145, from 150 to 159 => 11 5's , 165,175,185,195
[from 150 to 159, each no. has 1 no. of 5 except 155, 155 has 2 no. of 5]
total=18

201 to 300 => 205,215,225,235,245, 250 to 259 => 11 5's , 265,275,285,295
=> total=20

301 to 356 => 305,315,325,335,345,350,351,352,353,354,355(2 5's),356
=> total=13

total 5's = 18+20+13 = 51

Is this solution Helpfull? Yes (74) | No (2)  

misha  (10 years ago)

51
150-159=11 5's
250-259=11 5's
350-356=8 5's
125,135,145,........345=21 5's

Is this solution Helpfull? Yes (3) | No (8)  

Udayan N Kothari  (10 years ago)

123 to 356

125, 135, 145, 150 to 159 total 11 5's, 165, 175, 185, 195, 205, 215, 225, 235, 245, 250 to 259 total 11 5's, 265, 275, 285, 295, 305, 315, 325, 335, 345, 350, 351, 352, 353, 354, 2 5's in 355, 356

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

Pooja Chourey  (10 years ago)

52 5s are there

Is this solution Helpfull? Yes | No (4)  

mayank   (8 years ago)

.........
46

Is this solution Helpfull? Yes | No (3)  

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