Question
42, 61, 78, 93, 102,
109 Find the wrong number in the given number series.Solution
ATQ, The series is Number + consecutive prime numbers in descending order starting from 19 42 +19=61 61 + 17 = 78 78+13=91 91 + 11 = 102 102 +7 = 109 Therefore, 91 should come in place of 93.
ABCD is a cyclic quadrilateral, such that ratio of measures ∠A, ∠B and ∠C is 1 : 4 : 5, then the measure of ∠D is.
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