Test by Bikram | Mock GATE | Test 4 | Question: 60

Question

5	9	15
16	29	?
49	89	147

  $$\begin{array}{|c|c|c|} \hline  5 & 9 & 15 \\ \hline 16 & 29 & ?  \\ \hline 49 & 89 & 147  \\ \hline  \end{array}$$
The missing number is ________.

Answer 1

The relation between $16$ and $49$ $= 16*3 + 1,$ if $i$ sum then it is $49$

The relation between $29$ and $89$ $=  29*3 + 2,$ if $i$ sum then it is $89$

th relation between X and $147$  $= x*3  + 3,$ if $i$ sum then it is $147$

hence, $3X  + 3 =147$

            $X = 48$

Answer 2

5	9	15
16	29
49	89	147

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5	9	15
16=5*3+1	29=9*3+2	15*3+3= 48
49=5*9+4	89=9*9+8	147=15*9+12