Re:

Source: Princeton Review How many integers between 0 and 1570 have a prime tens digit and a prime units digit? A. 295 B. 252 C. 236 D. 96 E. 76 The OA is B Since 4 digits are prime digits (2, 3, 5, 7), if the number has 2 digits, then we have 4 x 4 = 16 such numbers. If the number has 3 digits, the...