To score 700+ on the GMAT, test takers must develop a strategy to answer the Quant questions in 2 minutes and Verbal questions in 1 minute & 20 seconds. Data sufficiency questions can be solved well within the 2minute mark, most likely in 1 minute and 30 seconds if the conditions and question are rephrased. Not all questions will be required to be rephrased but there are certain conditions where this technique is extremely useful, especially when concepts in Ratio & Proportion, Equations, Inequalities & Divisibility are tested.
Equations
This is the most common question type where rephrasing the conditions might be useful, especially in quadratic equations, and questions that require finding roots.
Let us look into a quadratic equation question type
For the following equations with positive roots, the value of k is greater than one
1) 3x^2 +5x + 2k = 0
2) (x+1)(3x+2) + 2k  2 = 0
1) Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient to answer the question asked.
2) Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient to answer the question asked.
3) BOTH...

Categories : Ratio and Proportion John and Walter have their incomes in the ratio 7 : 5. The expenses of John, Walter and Nancy are in the ratio 9 : 7 : 4. If Nancy spends $2800 and Walter saves $1100, how much is John’s saving is? 
Categories : Ratio and Proportion A proportion is represented by two ratios which are equated to each other. In GMAT Quant questions, we would be presented with one variable and three values for proportions. Reduce the ratio in either side to the lowest possible value before crossmultiplying. 
Categories : Ratio and Proportion Ratio is a math concept that is vital in your postMBA journey. It allows you to compare variables and provide a means to divide the variable with a common factor. “The ratio of boys to girls is seven to two” can be expressed as the proportion: B/G = 7/2. Do with this what you like: 7G = 2B or B = 7G/2, whatever. Forget the “:” with ratios. 