<h2>Practice-questions-find-missing-number--page-8</h2>

 Collection "Find the missing number"

Questions number series with answers

By Panos Kalliantasis

71. Find the missing number

Answer  The pattern is Two intependent series There are two alternating addition series First series 3, 6, 9, Simple addition series add 3 next term is 9+3=12 Second series 5, 10, 15, Simple addition series add 5 next term is 15+5=20 So correct answer is 12,20 

 

72. Find the missing number

 

 

 

73. Find the missing number

 

  Answer  The pattern is:3x2=6 6+4=10 10x2=20 20+4=24 24x2=48 This is a combination GP and AP Fist multiple by 2 and then add 4 

 

74. Find the missing number

 

  Answer  The pattern is:There are two alternating series. First Addition series add 4 10, 14, 18, …. next rerm is 18+4=22 Second subtraction series subtract 5 23, 18, 13, ... next term is 13-5=8 Correct answer is 22, 8

75. Find  the missing number 

 

  Answer  The pattern is:This is an alternating repetition series. A random number 15 is interprolated in simple addition series. The addition series is: 8, 10, 12, … add 2 So the next term is 12+2 =14 The answer is 15, 14

 

76. Find the missing number

 

  Answer  The pattern is:This is an alternating multiplication and subtracting series: First, multiply by 2 and then subtract 6 76-6=70 Correct answer is 70 

 

77. Find the missing number

 

  Answer  The pattern is:5 x 2 =10 5x 2 +2 = 12 12 x 2 =24 12 x 2 +2 =26 26 x2 = 52 26 x 2 +2 = 54 54 x 2 = 108 54 x2 +2 = 110 So the correct answer is:110 x 2 +2 = 222

 

78.Find the missing number

 

  Answer  The pattern is:7 2x7-1=14-1=13 13 2x13-1=26-1=25 25 25x2-1=50-1=49 49 49x2-1=98-1=97 So the next term is: 97x2-1=194-1=193

 

79. Find the missing number

 

Answer  The pattern is:12 = 12 + 1² +1 =12+1+1 = 14 14 = 14 + 2² +2 = 14+4+2 = 20 20 = 20 +3² + 3 = 20+9+3=32 32 = 32 +4² +4 = 32+16+4=52 52 = 52 + 5² + 5= 52+25+5=82 

80. Find the missing number

 

 

 

 

 Answer  The pattern is:110+11=121 121+22=143 143+33=176 176+ 44=220 220+55=275

 

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