4,36,144,400,__

• 4 36 144 400 900
  2*2 6*6 12*12 20*20 30*30
  +4 +6 +8 +10
• 5 years agoHelpfull: Yes(2) No(0)
• Here is the square of 2 is 4 ,square of 6 is 36, square of 12 is 144 ,square of 20 is 400 & squar of 30 is 900.
  you can see that in cases we added 4 in 2, 6 in 6, 8 in 12, 10 in 20.
  The answer is 900
• 5 years agoHelpfull: Yes(1) No(0)
• In the Series 2*2 ,6*6,12*12,20*20,Another series 30*30
  In this First term 2+4=6,6+6=12,12+8=20,20+10=30
• 5 years agoHelpfull: Yes(1) No(0)