if
212=25
213=36
214=47
215=58
216=69
218=??

• 811 last digit comes first and sum of all digits
• 10 years agoHelpfull: Yes(29) No(4)
• 212=24
  213=36
  214=47
  215=58
  216=69
  217=80
  218=91
  ans=91
• 10 years agoHelpfull: Yes(22) No(12)
• 212=(last digit)(sum of all digits)=252
  213=last digit=3 sum of all digits=6 i.e=36
  like that 218=811
• 10 years agoHelpfull: Yes(11) No(3)
• 2*12=24 ->25-24=1
  2*13=26->36-26=10
  2*14=28->47-28=19
  2*15=30->58-30=28
  2*16=32->69-32=37
  
  here 1,10,19,28,37 is an A.P. with diffrence of 9
  so next no in this AP is 46
  so2*18=36-> x-36=46
  =>x=82 ANS
• 10 years agoHelpfull: Yes(6) No(2)
• The resultant terms are in AP with a diff of 11. So, 217=69+11=80; 218=80+11=91
• 10 years agoHelpfull: Yes(5) No(2)
• 2*12=24 ->25-24=1
  2*13=26->36-26=10
  2*14=28->47-28=19
  2*15=30->58-30=28
  2*16=32->69-32=37
  
  here 1,10,19,28,37 is an A.P. with diffrence of 9
  so next no in this AP is 46(when term is 217),55
  so2*18=36-> x-36=55
  =>x=91 ANS
  
• 10 years agoHelpfull: Yes(4) No(1)
• ignore 1st digit
  12 reverse 21+4=25
  13 reverse 31+5=36
  14 41+6=47
  15 51+7=58
  16 61+8=69
  17 71+9=80
  18 81+10=91 so 91 is the answer.
• 10 years agoHelpfull: Yes(4) No(1)
• 212= (last digit)and(sum of all digits)=25
  212=2(2+1+2)=25
  213=3 (2+1+3)=36
  same for 218= 8(2+1+8)=811........is the right answer.
• 10 years agoHelpfull: Yes(2) No(0)
• 218=69+11=80
• 10 years agoHelpfull: Yes(1) No(0)
• 212=25
  213=36
  214=47
  215=58
  216=69
  218=811
• 10 years agoHelpfull: Yes(1) No(2)
• ans is 91
  217=69+11=80
  218=80+11=91
• 10 years agoHelpfull: Yes(1) No(0)
• 811 because add sum of the digits 2+1+8=11
• 10 years agoHelpfull: Yes(1) No(0)
• 218=91 as the difference is 11.
• 10 years agoHelpfull: Yes(1) No(0)
• first place 8 and then add all digit so we will get 811
• 10 years agoHelpfull: Yes(0) No(1)
• Put the last digit first I.e 8 and then the totak of all digits....so the and is 811
• 10 years agoHelpfull: Yes(0) No(0)
• 2*12=24 ->25-24=1
  2*13=26->36-26=10
  2*14=28->47-28=19
  2*15=30->58-30=28
  2*16=32->69-32=37
  
  here 1,10,19,28,37 is an A.P. with diffrence of 9
  so next no in this AP is 46(when term is 217),55
  so2*18=36-> x-36=55
  =>x=91 ANS
• 10 years agoHelpfull: Yes(0) No(1)
• 91
  25+11=36
  36+11=47
  47+11=58
  58+11=69
  69+22=91
• 10 years agoHelpfull: Yes(0) No(0)
• lets take in this way 25,36,47,58,69,?
  every other no is a sum of previous no by 11
  so
  ans:80
• 10 years agoHelpfull: Yes(0) No(0)
• so given
  25,36,47,58,69,?,?
  so each no is a sum of 11
  so 217=80
  ans 218=91
• 10 years agoHelpfull: Yes(0) No(0)
• 811 is the solution.write the largest digit first and then add all the digits.
  
• 10 years agoHelpfull: Yes(0) No(0)
• In 212, take 12
  (12*2)+1=25
  (13*2)+(1+9)=36 (1 is previous increment)
  (14*2)+(10+9)=47 (10 is previous increment)
  (15*2)+(19+9)=47 (19 is previous increment)
  likewise ans is 91
• 10 years agoHelpfull: Yes(0) No(0)
• 811..
  212=25; last digit 2 and sum of all digts 2+1+2=5
  similarly,218=811
  
• 10 years agoHelpfull: Yes(0) No(1)
• 212=25 (put last digit(2) as first digit in ans then add 3 nos)
  i.e, 21(2) put 2 as 1st digit then add 2+1+2=5 so ans is 25
  similarly 218=811
• 10 years agoHelpfull: Yes(0) No(0)
• ans:810
  see that in all last digit is first and sum of all digits
  
• 10 years agoHelpfull: Yes(0) No(0)
• 212=25 here in 10th position 2 and 2+1+2=5 finally 25
  213=36 here in 10th position 3 and 2+1+3=6 finally 36
  .............
  218= 82 here in 10th position 8 and 2+1+8=11,1+1=2 finally 82
• 10 years agoHelpfull: Yes(0) No(0)
• each solution is increased by 11 so 217 will be 80 and 218 will be 91
• 9 years agoHelpfull: Yes(0) No(0)
• just add the numbers u will get last digit.(2+1+8=11)and first digit will be the digit which is at one's place i.e 8 so the answer will be 811
• 9 years agoHelpfull: Yes(0) No(0)
• 212 -> 2(last digit) and 2+1+2=5 (sum of the digits) that is 25
  213-> 3(last digit) and 2+1+3=6 (sum of the digits) that is 36
  ..
  Similarly,
  218-> 8(last digit) and 2+1+8=11 (sum of the digits) that is 811
• 9 years agoHelpfull: Yes(0) No(0)
• All the RHS terms are obtained by adding 11
  so
  212=25
  213=25+11=36
  214=36+11=47
  215=47+11=58
  216=58+11=69
  217=69+11=80
  218=80+11=91
  ans=91
• 9 years agoHelpfull: Yes(0) No(0)
• There is a difference of 11 in each value hence 218=69+11=80.
• 9 years agoHelpfull: Yes(0) No(0)
• 2+1+2=5
  212last dig is 2
  now first digit =2
  second digit is= sum of the digits=5
  and in 218 = last digit is 8 and 2nd digit is sum of digit is 11=811
• 9 years agoHelpfull: Yes(0) No(0)
• 212=25 2,(2+1+2)-->25
  213=36 3,(2+1+3)-->36
  .
  .
  .
  .
  .
  .
  .
  .
  218=? 8, (2+1+8)--> 811
• 9 years agoHelpfull: Yes(0) No(0)
• 91
  11 is being added.so 217=69+11=80
  218=80+11=91
• 9 years agoHelpfull: Yes(0) No(0)
• 212=25
  213=36
  214=47
  215=58
  216=69
  217=70
  218=88
  ans=88
• 8 years agoHelpfull: Yes(0) No(0)
• 811
  LAST DIGIT AFTER SUM OF ALL DIGITS
• 8 years agoHelpfull: Yes(0) No(0)
• The answer is 80.for all the difference is 11 so I added 69+11 =80
• 8 years agoHelpfull: Yes(0) No(0)
• 2+1+8=11=1+1=2 LAST DIGIT IN A GIVEN NUMBER IS TAKEN AS A FIRST DIGIT IN A ANSWER AND SUM OF DIGITS OF A GIVEN NUM IS SECOND DIGIT IN A ANSWER SO ANSWER IS 82
• 8 years agoHelpfull: Yes(0) No(0)
• 811
  218= 811
  
  
• 8 years agoHelpfull: Yes(0) No(0)
• 2+1+8=11
  811
• 8 years agoHelpfull: Yes(0) No(0)
• 8in highest place and sum of the singlle numbers next to the 8 is 811 answer
  
• 8 years agoHelpfull: Yes(0) No(0)
• Answer is 811 , out of given nimber last digit will occupy the first position and the sum of all the digits will occupy the remaining positions.
• 6 years agoHelpfull: Yes(0) No(0)
• Each number is 11 points apart and 216 to 218 would be adding 22 points so the answer is 91.
• 4 years agoHelpfull: Yes(0) No(0)