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SSC CGL Model Paper 19

Question : 1 of 100

Marks: +1, -0

\begin{array}{ccc} 14 & 28 & 44 \\ 12 & 39 & 68 \\ 19 & ? & 23 \end{array}

Solution:

Concept:

The middle number in each row follows a fixed relation with the left and right numbers.

Explanation:

Check row 1:

\frac{(14+44)-2}{2}=\frac{56}{2}=28

Check row 2:

\frac{(12+68)-2}{2}=\frac{78}{2}=39

So the rule is: middle

=\frac{(\text{left}+\text{right})-2}{2}

For row 3:

\frac{(19+23)-2}{2}=\frac{40}{2}=20

Answer:

The missing number is

20

, which is option D.

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