Select the number from among the given options that can replace the (?) in the following series.
183, 173, 153, 123, 83, ?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 33.
Given series: 183, 173, 153, 123, 83, ?
Logic: Subtract multiples of 10 to the previous number to obtain the next number.
183 - 10 = 173, 173 - 20 = 153, 153 - 30 = 123, 123 - 40 = 83, 83 – 50 = 33