SAT Math Multiple Choice Practice Question 567: Answer and Explanation
3. If each number in the following sum were increased by t, the new sum would be 4.22. What is the value of t ?
Correct Answer: D
D We can use PITA for this question. First use C, 0.33, for t. If we must add t to each of the four values, we will have 4t. 4 × 0.33 = 1.32. When 1.32 is added to the sum in the question of 2.74, the total is 4.06, which is less than the 4.22 we were looking for. Eliminate A, B, and C and try a larger number. In D, 0.37 × 4 = 1.48, and 1.48 + 2.74 = 4.22, just what we were looking for.