What will come in the place of question mark (?) in the following number series?
600, 125, 30, ?, 7.2, 6.44, 6.288
19.8
18.72
24.5
11
The pattern of the given number series is as following:
→ 600
→ 600 ÷ 5 + 5 = 125,
→ 125 ÷ 5 + 5 = 30,
→ 30 ÷ 5 + 5 = 11,
→ 11 ÷ 5 + 5 = 7.2,
→ 7.2 ÷ 5 + 5 = 6.44
→ 6.44 ÷ 5 + 5 = 6.288
Hence, the required number in place of question mark in the given number series would be 11.
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