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What should come in place of the question mark '?' in the following number series? 137, 146, 159, 176, ?, 222.

What should come in place of the question mark '?' in the following number series? 137, 146, 159, 176, ?, 222. Correct Answer 197

Calculation:

Considering the above series,

137, 146, 159, 176, ?, 222

137 + 9 = 146

146 + 13 = 159

159 + 17 = 176

176 + 21 = 197

197 + 25 = 222

∴ The value of ? is 197.

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