Question

Choose the number from the options given below that will replace the question mark (?) in the following series. 423, 407, 439, 391, 455, ?

Answer 1

Answer:

375

Step-by-step explanation:

The next number for given series 423,407,439,391,455 is 375

423 -16 = 407

407 +32 = 439

439 -48 = 391  

391 +64 = 455

455 -80 = 375  

The series follows the pattern

-16, 32, -48,+64, -80