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Maths Puzzle
Numerical Ability
if a certain number is dubled and the result is increased by7, the number obtained is 19. What is the original number?
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hi
i want to ask that how can i find the sum of the equations like
1*+2*+......+n* where * = 2
Please tell me what difference is between the two formulas. I know the answer but I want to know the significance between the two.
A=15
B=25
formula 1
(A/B)-1=
Answer: =