Number Series
Select the number from among the given options that can replace the question mark (?) in the following series.139, 136, 131, 124, 115, ?, 91
Each of the digits in the number 8569142 is arranged in the descending order from left to right. The position(s) of how many digits will remain unchanged in the new number thus formed as compared to that in the original number?
What should come in place of the question mark (?) in the given series?801, 800, 797, 792, 785, ?