what will be the next number in the following series??
4,18,...,100,180,294- (a)32 (b)36 (c)40 (d) 48

• 2x2x1=4;
  3x3x2=18;
  4x4x3=48;
  5x5x4=100;
  6x6x5=180;
  7x7x6=294;
  so answer is (d) 48.
• 9 years agoHelpfull: Yes(92) No(1)
• 2^3-2^2=4;
  3^3-3^2=18;
  4^3-4^2=48;
  5^3-5^2=100;
  6^3-6^2=180;
  7^3-7^2=294;
  so answer is (d) 48.
• 8 years agoHelpfull: Yes(6) No(0)
• 2^2*1=4
  3^2*2=18
  4^2*3=48
  5^2*4=100
• 8 years agoHelpfull: Yes(3) No(0)
• 1/7, 3/4, 4/9, 5/6, 6/11, 7/8, ?
  
  sol:
  
  N: 1, 1+2, 4, 2+3, 6, 3+4, 8, 4+5
  D: 7, 4, 9, 6, 11, 8, 13, 10 (-3 and +3 to each term)
  
  so the next two terms will be 8/13 and 9/10.
• 8 years agoHelpfull: Yes(2) No(13)
• 3. 1/7, 3/4, 4/9, 5/6, 7/11, 7/8, ?
  Answer is 10/13
  
  For numerator, 1, 1+2=3, 4, 4+1=5, 7, 7+0=7, 10
  For denominator, 7, 7-3=4, 4+5=9, 9-3=6, 6+5=11, 11-3=8, 8+5=13
• 8 years agoHelpfull: Yes(1) No(12)
• 48
  you plus 14, 30, 52, 80, 114
• 8 years agoHelpfull: Yes(1) No(2)
• 2^2*1=4
  3^2*2=18
  4^2*3="48"
  5^2*4=100
  6^2*5=180
  7^2*6=294
  so the ans is 48
• 8 years agoHelpfull: Yes(1) No(0)
• Please explain your answer properly to make it approve?48
• 9 years agoHelpfull: Yes(0) No(4)
• The answer is 438...Refer Sourav Solution .
• 8 years agoHelpfull: Yes(0) No(2)
• 2*2*1=2
  3*3*2=18
  4*4*3=48
• 8 years agoHelpfull: Yes(0) No(0)
• 14 * 21 = 294
  12 * 15 = 180
  10 * 10 = 100
  8 * 6 = 48
  6 * 3 = 18
  4 * 1 = 4
  
  The left side of the multiplications are increasing in the order of 2 and the right side in 2 , 3 , 4 , 5 , 6
• 8 years agoHelpfull: Yes(0) No(0)
• 2*2*1=4
  3*3*2=18
  4*4*3=48
• 8 years agoHelpfull: Yes(0) No(0)
• 2*2*1=4
  3*3*2=18
  4*4*3=48
• 8 years agoHelpfull: Yes(0) No(0)