10, 12, -36,-7,-5,-15,19,21

• 10 + 2 = 12 , 12 (-3) = -36
  -7 + 2 = -5 , -5(3) = -15
  19 + 2 = 21, 21(-3) = - 63
• 6 years agoHelpfull: Yes(32) No(3)
• ANSWER is -63
  
  see the series first two numbers increase and then a number decrease to a value negative three times of previous number.
  -36=12*-3
  -15=-5*3
  21*-3=-63(it should be less than previous value)
• 6 years agoHelpfull: Yes(3) No(0)
• leave 10,-7,19
  then 12*3
  -5*3
  so 21*3
• 6 years agoHelpfull: Yes(2) No(0)
• 10+2 = 12
  12 *-3 = -36
  ----
  -7+2 = -5
  -5*+3 =-15
  ---
  19+2 = 21
  21*-3 = -63
  
  Add 2 for every 3 gaps and multiply +3 and -3 number sequentially
• 6 years agoHelpfull: Yes(1) No(0)
• ***one set consists of three numbers
  
  10,12,-36-> 10+2=12->12(-3)=-36
  -7,-5,-15-> -7+2=-5->-5(3)->-15
  19,21,?-> 19+2=21->21(-3)->? i.e.-63
• 6 years agoHelpfull: Yes(1) No(0)
• 10+2=12, 12*(-3)=-36
  -----
  19+2=21, 21*(-3) = -63
• 6 years agoHelpfull: Yes(0) No(0)
• +2*-3,+2*3,+2*-3
  answer=-63
• 6 years agoHelpfull: Yes(0) No(0)
• 10+2= 12 12* (-3) = (-36)
  (-7)+2= (-5) (-5) * 3= -15
  19 +2= 21 21* 3 = 63
• 6 years agoHelpfull: Yes(0) No(0)
• 10+2=12*-3=-36
  -7+2=-5*3=-15
  19+2=21*-3=-63
• 6 years agoHelpfull: Yes(0) No(0)
• answer is -63:
  10,12,-36,-7,-5,-15,19,21
  
  10 , 10+2 , 12*-3 , -7,-7+2, -5*3, 19 , 19+2 ,21*-3
• 6 years agoHelpfull: Yes(0) No(0)
• 10 + 2 = 12 * -3 = -36
  -7 + 2 = -5 * 3 = -15
  19 + 2 = 21 *-3 =- 63
• 6 years agoHelpfull: Yes(0) No(0)
• -63
  LOGIC NUM+2,NUM*3;
• 6 years agoHelpfull: Yes(0) No(0)
• each three digits are connected in a pattern.second digit geted by adding 2 in first digit.third digit is geted by multiply 3 to previous digit.
  10+2=12 12*3=36
  -7+2=-5 -5*3=-15
  19+2=21 21*3=63
• 6 years agoHelpfull: Yes(0) No(0)