15 Select the number from among the given options that can replace the question mark (?) in the following series.
24, 48, 51, 204, 209, ?
24 x 2 = 48 48 + 3 = 51 51 x 4 = 204 204 + 5 = 209 209 x 6 = 1254
The value of 97 × 103 is _________.
262 × 15 + (?)² = 4099
62.94% of 1800 - 15.03 % of 2400 = ?
2/5 of 3/4 of 7/9 of 7200 = ?
464 + 181 +? = (154 × 25) - (15) 2
(7 ÷ 0.125) x (10 ÷ 10/3 ) = ?
6 × 1.8 × 0.25 × 70 = ? + 9.5
82% of 400 + √(?) = 130% of 600 - 85% of 400
6% of 520 + 5% of 620 = ?
