Find the odd one out: 13, 17, 19, 21
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Correct answer: (D) 21
Explanation
13, 17, 19 are prime; 21 = 3 × 7 is composite.
From DSSSB TGT Computer Science Full Mock Test 4
This is question 26 of DSSSB TGT Computer Science Full Mock Test 4. See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.