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What should come in place of question mark ‘?’ in the following number series? 4, 90, ?, 9790, 98010

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What should come in place of question mark ‘?’ in the following number series?

4, 90, ?, 9790, 98010
1). 904
2). 975
3). 948
4). 970


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3 vote
Answered by on | Votes 3 |

(4 + 5) × 10 = 90

(90 + 7) × 10 = 970

(970 + 9) × 10 = 9790

(9790 + 11) × 10 = 98010

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