Question

6, 12, 21, ?, 48
A.33
B.38
C.40
D.45

Answer 1

The Answer is...

A.33

Pattern is +6, +9, +12, +15...

6 +6=12
12+9=21

Missing term : 21 +12=33

6+3+3=12
12+6+3=21
21+9+3=33
33+12+3=48

Answer 2

hey, here is your answer......


Option.A is correct i.e., 33 is the correct answer......



here is the explanation.,



given, 6, 12, 21, ?, 48.......


==> 6 = 3×2......

==> 12 = 3×4......

==> 21 = 3×7.......

==> ? = 3×y.........

==> 48 = 3×16......


2, 4, 7, y, 16..... are in series such that.,


==> 4-2 = 2.....

==> 7-4 = 3.....

"y-7" should be equal to 4., and "16-y" should be equal to 5., because,


differences are in A.P with common difference 1..... so,


y-7 = 4.... ==> y = 11......




we got that, ? = 3×y......


==> ? = 3×11.... = 33.....


Therefore, required no. is 33......








hope this helps you......
thank you......



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