Practice MCQ Questions and Answer on Missing Number Finding

11.

Find the missing number?

• (A) 16
• (B) 4
• (C) 9
• (D) 7

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 Logic: The inner digit in each segment equals the sum of the two numbers in the outer part of the opposite segment. Thus, 2 +x = 9 x = 7. Missing number = 7.

12.

Find the missing number?

• (A) 2
• (B) 5
• (C) 9
• (D) 13

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 Using the top two grids as a source, numbers in the lower left grid equal the sums of numbers in corresponding positions of the top two grids, subtracting 1 each time, and numbers in the lower right grid equal the differences between numbers in corresponding positions of the top two grids, adding 1 each time.

13.

Find the missing number?

• (A) 34
• (B) 41
• (C) 38
• (D) 32

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 8 8 + 4 = 12 12 + 5 = 17 17 + 6 = 23 23 + 7 = 30 30 + 8 = 38.

14.

Find the missing number?

• (A) 2
• (B) 9
• (C) 8
• (D) 5

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 Reading the top and bottom lines as 2 digit numbers, multiply these together to give the 3 digit result, written in the middle. Thus, 23 * 34 = 782. Missing Element = 2.

15.

Find the missing number?

• (A) 13
• (B) 2
• (C) 7
• (D) 11

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 The numbers in the segments of the top left circle equal the sum of the numbers in corresponding segments of the lower two circles, and the numbers in the top right circle equal the difference between numbers in corresponding segments of the lower two circles.

16.

Find the missing number?

• (A) 4
• (B) 15
• (C) 9
• (D) 6

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 Logic: Difference of left hand Element * Difference of Right hand Element = Top Element. So, (8 - 2) * (5 - 4) = Missing Element Missing Element = 6 * 1 = 6.

17.

Find the missing number?

• (A) 13
• (B) 11
• (C) 17
• (D) 15

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 Logic (Row-wise): First Number * 2 = Second Number Second Number +3 = Third Number Thus, Missing Number, 5 *2 = 10 + 3 = 13.

18.

Find the missing number?

• (A) 81
• (B) 90
• (C) 87
• (D) 103

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 Moving left to right, the numbers represent multiples of 12, subtracting 1, for the first step, adding 2 for the second, subtracting 3 for the third, adding 4 for the next etc. etc. So, 12 * 7 + 6 = 90.

19.

Find the missing number?

• (A) 6 , 1
• (B) 8 , 1
• (C) 1 , 6
• (D) 1 , 8

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 Reading each row as 3 separate 2-digit numbers, the central number equals the average of the left and right hand numbers. So, (15 +x)/2 = 48 15 + x = 96 x = 81. Missing Numbers = 8 ,1.

20.

Find the missing number?

• (A) 9
• (B) 6
• (C) 3
• (D) 13

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 Start with the numbers along the top right diagonal of the diagram, and add pairs of adjacent numbers together, putting the result in the square to the lower left of the original pair of numbers. Continue in this way towards the lower left hand corner. I.e 4 + 2 = 6 2 + 1 = 3 6 + 3 = 9 So, 1 + x = 7 x = 6