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Questions  >>  Olympiad-Math  >>  Class 10
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Q)

Find the next term of given sequence .. $16, 18, 21, 26, 33, 44, 57, ....$

$(A) \; 66 \\(B)\; 77 \\(C)\; 82 \\(D)\; 74 $

16+2=18
18+3=21
21+5=26
26+7=33
33+11=44
44+13=57
so it is the series of prime numbers so the next prime number is 17 now
57+17=74
so the answer would be 74
commented Oct 11, 2017 by annieayaaz

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