Multiple choice

Find the wrong term in sequence : 73, 94, 115, 136, 147, 178

  1. 94

  2. 136

  3. 147

  4. 178
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C Correct answer
Explanation

The sequence follows an arithmetic progression with a common difference of 21 (73+21=94, 94+21=115, 115+21=136, 136+21=157). 147 is incorrect; it should be 157.

AI explanation

The differences between the consecutive terms of the sequence are $94 - 73 = 21$, $115 - 94 = 21$, $136 - 115 = 21$, $147 - 136 = 11$, and $178 - 147 = 31$. Since all the other steps involve adding 21, the term 147 breaks this pattern. The correct term at this position should be $136 + 21 = 157$, making 147 the wrong term in the sequence.

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