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Previous Year Question (PYQs)

Find out the wrong number in the given sequence of numbers. $22,33,66,99,121,279,594$




Solution

Pattern should alternate $\times 1.5,\ \times 2$: $22\times 1.5=33,\ 33\times 2=66,\ 66\times 1.5=99,\ 99\times 2=\mathbf{198}$ (not $121$), $198\times 1.5=\mathbf{297}$ (not $279$), $297\times 2=594$. The first error is $121$ (which also causes the later mismatch).

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