The radii of two cylinders are in the ratio 1 : 4 and

69, 35.5, 39.5, 68.25, 152.5, ?

3      2       10      ?      17     16

Find the missing number in the given number series.

4, ?, 110, 665, 4660, 37285

195% of 1420 + 72 × 25 =?

55      56       52      61       ?       70       34

[(145)² ÷ 25 × 52] ÷ ? = 29 × 13

53 × 38 + 32 × ∛54872 = ?

What will come in place of the question mark (?) in the following series?

24, 25, 34, 59, 108, 189, ?

(10² × 24)/8 = ?

What will come in place of (?) question mark in the given number series.

10, 17, 26, 37, 50, ?