Practice MCQ Questions and Answer on Missing Number Finding

141.

Find the missing number?

• (A) 15
• (B) 16
• (C) 18
• (D) 21

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 Working in columns, starting with the top number, add 4 to give the next value down, and add 5 to give the one under that. So, In Third Column: 7 + 4 = 11 and 11 + 5 = 16. Missing element = 16.

142.

Find the missing number?

• (A) 89
• (B) 96
• (C) 104
• (D) 91

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 Moving from left to right, numbers follow the sequence of square numbers, from 6 to 10, subtracting 4 each time. So, Missing Element = 10 * 10 - 4 = 96.

143.

Find the missing number?

• (A) 5
• (B) 2
• (C) 1
• (D) 8

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 Top Row + Middle row = Bottom Row 268 + 373 = Bottom Row Bottom Row = 641. Required Element = 1.

144.

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.

145.

Find the missing number?

• (A) 3
• (B) 9
• (C) 0
• (D) 6

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 Working from top to bottom, reading each pair of numbers as a 2 digit value, values represent the reverse alphabetical value of letters of the alphabet, starting with A, written with 3 straight lines only.

146.

Find the missing number?

• (A) 40
• (B) 83
• (C) 62
• (D) 16

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 First row : 12 /4 = 21 /7. Second row : 10 /5 = 4 /2. Third row : 64 /8 = 24 /3. So, required missing character = (83).

147.

Find the missing number?

• (A) 12
• (B) 7
• (C) 10
• (D) 3

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 Logic (Row-wise): Element at Middle = Difference of two left element + difference of two right element. Thus, x = 5 - 1 + 4 -1 x = 4 + 3 x = 7. Missing number = 7.

148.

Find the missing number?

• (A) 821
• (B) 796
• (C) 648
• (D) 849

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 Logic: (Previous Number + 1 ) * 3 = Next Number. So, Missing Number = (282 + 1) * 3 = 849.

149.

Find the missing number?

• (A) 1
• (B) 5
• (C) 3
• (D) 7

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 Taking any series of 3 numbers in a straight line in the diagram, their total is always 19. So, 4 + 14 + x = 19. x = 1.

150.

Find the missing number?

• (A) 2
• (B) 7
• (C) 0
• (D) 4

Show Answer

 Start with the top left hand box, and move around the others in a clockwise spiral towards the centre. Read each box as a pair of 2 digit numbers, one above the other. The sum of the 2 digit numbers in each box follows the sequence 55, 60, 65, 70 and 75. So, 43 + 3X = 75 3X = 32 Thus, X = 2 Missing number = 2