Roentgen is to X-rays as Becquerel is to ... ?
Wax is to Grease, as Milk is to
X is in the East of Y which is in the North of Z. If P is the East of Z then in which direction of X, is P:
"RUMOUR" is written as "MURRUO". How is "RACKET" written in that code language?
0, ?, 8, 15, 24
0.15, 0.3, _, 1.2, 2.4. What number should fill the blank?
0.5, 0.55, 0.65, 0.8, (…..)
0.5, 0.55, 0.65,0.8,?
1, 10, 7, 20, 13, 30, 19, ... choose which pair of numbers comes next?
1, 3, 5, 7, ? , 13