Question

In the Series 13,15,21,33,53,?
What is the number in the Question mark?
A.82
B.83
C.102
D.81
E.92

Answer 1

Answer:

83 is the right answer

because first you have to  write 2 table up to 15  

2x1=2  (13+2=15)

2x2=4

2x3=6  (omit 4 then 15+6=21)  (here  1 value omission)

2x4=8

2x5=10

2x6=12(omit 8 and 10 then 21+12=33)  (here  2 value omission)

2x7=14

2x8=16

2x9=18

2x10=20(omit 14,16,18 then 33+20=53)  (here  3 value omission)

2x11=22

2x12=24

2x13=26

2x14=28

2x15=30(omit 22,24,26,28 then 53+30=83)  (here 4 value omission)

Step-by-step explanation: