Collection "Find the missing number"
These numbers relate to each other with some maths formula or mathematical operations or logical.
One has to find this hidden relationship among these numbers and then solve it for the missing numbers.
61. Find the missing number
Answer The pattern is:Square of the sum of the number at the corner - 2 = Number at the center. (1+2+6+3)^2-2=12^2-2=142 So (4+3+5+2)^2-2=196-2=194
62. Find the missing number
Answer The pattern is:Column 7^2=49 49-2*7=35 (35) 5^2-3^2=16 Column 2 6^2=36 36-2*6=24 (24) 4^2-2^2=12 So column 3 8^2=64 64-2*8=48 (48) 8^2-4^2=48
63. Find the missing number
Answer The pattern is:3600= 60^2
8100=90^2
22500=150^2
14200 it is not a square of any nunber
S0 correct answer is B
64. Find the missing number
Answer The pattern isIn this alternating repetition series, the random number 18 is interpolated every other number into an otherwise simple addition series that increases by 2, beginning with the number 8.
12+2=14
18 is interpolated every other number
Answer is 14, 18 :
65. Find the missing number
Answer The pattern is:This is an alternating multiplication and subtracting series: First, multiply by 2 and then subtract 8.
9X2=18 18-8=10 10X2=20 20-8=12 12X2=24
So 24-8=16 16x2=32
Answer is 16, 32
66. Find the missing number.
Answer The pattern is:3*1=3 3*3=9 9*5=45 45*7=315 We notice that we multiply by 1,3,5,7,..
It is an arithmetic progression with a difference of 2
The next term is 9 So 315*9=2835Correct answer is C
67. Find the missing number
Answer The pattern is:First 7x3=21
Second 8x9=72
Third 12 x ?=84
Therefore 12x7=84
Correct is C=7
68. Find the missing number
Answer The pattern is:The pattern is:
8x1/2=4
4x(2x1/2)=4x1=4
4x2=8
8x4=32
The numbers with which we multiply are a Geometric progression
First term is 1/2 and common ratio is 2
1/2, 1, 2, 4, 8
Therefore the next term is 32X8=256
69. Find the missing number
Answer The pattern is:4*1+1 = 5
5*2+2 = 12
12*3+3 = 39
39*4+4 = 160
160*5+5 = 805
Answer is option D
70. Find the missing number
Answer The pattern is:8X1-1=7
7X2-2=12
12X4-4=44
44X8-8=344
Answer is 344
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