_____,21,43,87,175 number series
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10,21,43,87,175 number series
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Answer: 10
Step-by-step explanation:
10 + 11 = 21 [second no.]
(11+11 = 22 so,the next no. will be by adding 22 to the previous i.e. 21)
21+22= 43 [third no.]
(22+22 = 44 so,the next no. will be by adding 44 to the previous i.e. 43)
43 + 44 = 87 [fourth no.]
and so on
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