In certain language, PEAR is coded as 7519, and TOIL is coded as 2693, then how DOCTOR be written in that code?

Find the odd man out

A certain code 564 means all the best, 736 means best of luck and 423 means all is luck. Which of the following is the code for luck?

Identify the next number in the following series: 2, 8, 26, 62, 122, 212, _______

Find the missing number in the given series: 4, 18 ______, 100, 180, 294, 448

Find the odd man out from the following: 445, 221, 109, 46, 25, 11, 4

Find out the next number in the following series $\displaystyle 7, 11, 13, 17, 19, 23, 25, 29$?