Verbal Reasoning - Arithmetic Reasoning - Discussion
Discussion Forum : Arithmetic Reasoning - Section 1 (Q.No. 46)
46.
The total number of digits used in numbering the pages of a book having 366 pages is
Answer: Option
Explanation:
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.
Discussion:
22 comments Page 3 of 3.
Sano Vai said:
6 years ago
Simply: 189+ (366-99) *3= 990.
Anomie said:
5 years ago
There were 3 columns of digits.
1st column = 366.
2nd column = 366-9 = 357 (i.e 2nd column numbers start from end of number 9).
3rd column = 366-99 = 267 (i.e 3rd column numbers Start from end of number 99).
Hence answer will be 366+357+267= 990.
1st column = 366.
2nd column = 366-9 = 357 (i.e 2nd column numbers start from end of number 9).
3rd column = 366-99 = 267 (i.e 3rd column numbers Start from end of number 99).
Hence answer will be 366+357+267= 990.
(8)
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