Practice MCQ Questions and Answer on Missing Number Finding

91.

Find the missing number?

• (A) 1
• (B) 4
• (C) 5
• (D) 7

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 Center of the Triangle = (Sum of the vertices )/2 1st Triangle 4 = (4 +3 +1)/2 2nd Triangle 10 = (7 +7 +6)/2 So, 6 = (5 + 3 +x)/2 Or, 12 = 8 +x x = 4.

92.

Find the missing number?

• (A) 23
• (B) 27
• (C) 19
• (D) 21

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 Looking at the diagram as two columns, numbers in the left hand column increase by 5, 6, 7 etc, and numbers in the right hand column increase by 6, 7, 8 etc. So, Missing Number = 15 + 8 = 23.

93.

Find the missing number?

• (A) 56
• (B) 47
• (C) 51
• (D) 63

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 In each diagram, multiply the left hand number by the upper central number to give the central number one line down, and multiply the right hand number by the upper central number to give the lower central number. So, 7 * 3 = 21. 7 * 8 = 56.

94.

Find the missing number?

• (A) 3
• (B) 13
• (C) 1
• (D) 9

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 Starting at the top left and working down, then to the right and up, and finally to the right and down in a zig-zag shape, numbers follow the repeated sequence, subtracting 1 then adding 3 etc.

95.

Find the missing number?

• (A) 2
• (B) 1
• (C) 3
• (D) 5

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 Logic (Column-wise): Central Number = (Upper element + lower element)/2 Thus, 6 = (7 + x)/2 x = 12 -7 x = 5

96.

Find the missing number?

• (A) 9
• (B) 6
• (C) 0
• (D) 1

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 Reading each row as a 4 digit number, from top to bottom, rows follow the sequence of Cube Numbers from 16 to 19. So, In the last row, there will cube of 19 i.e. 19 * 19 * 19 = 6859. Missing Element = 9.

97.

Find the missing number?

• (A) 8
• (B) 15
• (C) 5
• (D) 11

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 First Row, Middle Digit = First Element + Last Element + 2 11 = 7 + 2 + 2 Second Row, 14 = 6 + 4 + 4 Third Row, 19 = 5 + x + 6 So, x = 8.

98.

Find the missing number?

• (A) 7
• (B) 17
• (C) 5
• (D) 11

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 Start with the row of 4 numbers in the centre of the diagram, and add adjacent pairs of numbers together, putting the results in the circles directly above. Repeat this pattern for the next row up. Next, calculate the difference between adjacent numbers in the middle row, putting the results in the circles directly below. Repeat this pattern for the next row down.

99.

Find the missing number?

• (A) 4
• (B) 7
• (C) 3
• (D) 9

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 Taking the top row of circles, numbers in the central circle equal the sum of the numbers in corresponding segments of the left and right hand circles. In the bottom row, numbers in the central circle equal the difference between numbers in corresponding segments of the left and right hand circles.

100.

Find the missing number?

• (A) 19
• (B) 6
• (C) 17
• (D) 1

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 Add up the four outer numbers and place your answer in the centre square of the shape one place clockwise. So, 7 + x + 4 + 2 = 14. x = 1.