Question

mary bought a new exercise book and she numbered all the pages. she wrote 151 digits in all. how many pages were there in the exercise book? options (A) 80 (B)90. (C)95. (D)91

Answer 1

hi friends here is youranswer the number of pages in excise book 80 because she wrote 151 digital digits in all in that book the number of 2 digit numbers are 71 that is from 10 to 80 and if u x 2 so it is 142 and if we add 9 to 142 becomes 151
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