Question

What is the 8th number in these sequence. 42,63,94,135,96,157…......

Answer 1

Correction : What is the 8th number in this sequence.
42,63,94,135,186,247 .......

Final Answer : 399

Steps:
1) We know,
63-42= 21
94-63 = 31 :
135-94= 41 :
186-135 = 51
247-186 = 61
Now,
7th number is : 247+ 71 = 318
8th Number is : 318+81 = 399

Hence, 8th number in the sequence is
$\boxed{399}$