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The total number of digits used in numbering the pages of a book having 366 pages is
A. 732 B. 990
C. 1098 D. 1305
Read Solution (Total 3)
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- Ans:B.990
Total number of digits
= (No. of digits in 1- digit page nos. + No. of digits in 2-digit page nos. + No. of digits in 3- digit page nos.)
= (1 x 9 + 2 x 90 + 3 x 267) = (9 + 180 + 801) = 990.
- 12 years agoHelpfull: Yes(16) No(6)
- 1 - 9 = 1*9 digits
10 -99 = 2*10*9 = 180 digits
100-366 = 3* 267 = 801 digits
total: 990 - 7 years agoHelpfull: Yes(1) No(1)
- B 990.
No of 1 digit =9
No of 2 digits = 90 (10 to 99). 90*2=180
No of 3 digits = 267 (100 to 366). 267*3=801
On adding 9+180+801= 990 - 6 years agoHelpfull: Yes(0) No(1)
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