In the question, a highlighted word is given, which is followed by three statements. You have to identify in which statement the highlighted word is incorrectly used and mark it as your answer
Serendipity
1.   The paparazzi relied on serendipity to figure out which hotel entrance the celebrity would use
2.   As worms are bred in a serendipity pool, so are evil thoughts in idleness
3.   A serendipity economy combined with a surge in the number of teenagers is likely to have contributed to rising crime levels in the US
Meaning of ‘serendipity’ – the occurrence and development of events by chance in a happy way The word is correctly used in statement (1) Statement (2) – the context of the sentence talks about a production of worms, ‘serendipity’ doesn’t support the context of the sentence. So, this is an incorrect option Statement (3) – the context of a sentence talks about an economy in which crimes are rising high, ‘serendipity’ is a positive word, it doesn’t support the context of the sentence. So, this is an incorrect option
112 ? 336 840 2520 8820
...12 11 18 34 89.5 259.5
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2, 12, 90, 240, ?, 1260
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...If 18 x 10 42 -22,
Then, 50% of 2x - 25% of x = ?
...3, 49, 191, 477, ?, 1673
31   48    67    90   ?      150
102, 246, 442, 698, 1022, ?