2 4 3 7 16 107 ( ) A.1594 B.1684 C.1707 D.1856 选C,为啥
问题描述:
2 4 3 7 16 107 ( ) A.1594 B.1684 C.1707 D.1856 选C,为啥
答
前2个相乘再减5,得后1个.
2×4-5=3,4×3-5=7,3×7-5=16,7×16-5=107,所以后面1个是 16×107-5 = 1707.