Insert the missing number.
10, 5, 13, 10, 16, 20, 19, (....)

A. 22 B. 40
C. 38 D. 23

• there are 2 series..
  10,13,16,19..
  5, 10, 20..
  next answer will be 40
• 10 years agoHelpfull: Yes(5) No(0)
• 10,5,13,10,16,20,19,...
  tHEY ARE FOLLOWING TWO PATTERNS.
  1ST 10,13,16,19,.. WITH AN ADDITION OF 3 IN EACH CONCEQUITIVE STEP.
  
  2ND 5,10,20,40, 40 IS THE ANSWER,AS THE 2ND PATTERN IS FIRST NUMBER *2,
  HENCE 20*2=40.
• 9 years agoHelpfull: Yes(2) No(1)