Question 132
What will come in place of thequestion mark (?) in the following number series?
121 238 472 ? 1876 3748
Solution
Each number is multiplied by 2 and then 4 is subtracted from it.
121 $$\times 2 - 4$$ = 238
238 $$\times 2 - 4$$ = 472
472 $$\times 2 - 4$$ = 940
940 $$\times 2 - 4$$ = 1876
1876 $$\times 2 - 4$$ = 3748
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