What comes next in the series 4, 6, 9, 13……………………?

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Finding the pattern: 6−4=2 9−6=3 13−9=4 The differences between consecutive numbers are +2, +3, +4. Following this pattern, the next difference should be +5. So,  13+5=18.

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2nd leader of Israel to visit India 

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Ronaldo made his career in 1998. At age 20. Ronaldo confirmed his retirement from football on 16 January 2018. Ronaldo belongs to   Portuguese .

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He fought Iraq war and war in Afghanistan Service __ United States marine corps

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Capital _ Abu Dhabi Currency_ Dirham

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By China National space administration (CNSA) to send a Rebotice space craft

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UN office on drugs established in 1997 HQ_ Vienna ,Austria

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The edge of paper page and columns is known as margin.

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The mean is calculated by dividing the sum of the terms by the number of terms. Mean = Sum of the terms/ Number of terms ​ Given that the mean is 40 and there are 7 terms, we can find the sum as: 40 = The sum of the terms/7 ​ Multiplying both sides by 7: Sum of the terms = 40 × 7 = 280

Explanation
Died on 20 Nov 1910 Famous book war and peace