Question
Which number will replace the question mark (?) in the
following series? 157, 174, 193, 216, ?, 276, 313Solution
The logic followed here is the difference between the numbers are consecutive prime numbers starting from 17. 157 + 17 = 174 174 + 19 = 193 193 + 23 = 216 216 + 29 = 245 245 + 31 = 276 276 + 37 = 313
A train passes an electrical pole in 15 seconds and passes a platform 345 m long in 60 seconds. Find the length of the train.
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