Which of the following is a Noble gas?
The six naturally occurring noble gases are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and the radioactive radon (Rn). Noble gases.
32 63 121 ? 453 889
...9 15 90 95 475 479
6 a b c d e
Find the value of c.
...1400 350 700 175 ? 87.5
...2, 12, 90, 240, ?, 1260
If 152 242x 332 404 314, then find the value of (2x – 1)?
...122, 116, 125, 119, 128, ?
If 10 9 38 x 5428
Then, 2x² + 1 = ?
...720 ? 240 180 144 120
...62 123 214 341 ? 727
...111 113 117 120 ? 133
