Who is the father of

What value should come in the place of (?) in the following questions?

√16 * ? = √144 + (18 * 4 ÷ 3)

5/12 of 216 + 3/4 of 120 – 2/5 of 140 = ?

1299.999 ÷ 325.018 × 24.996 = ?

Find the HCF of 15x² + 8x – 12, 3x² + x – 2, 3x² - 2x, 9x² - 12x + 4

(5832) ^2/3 / (104976)^3/4 X ? = ( `sqrt(18)` ` ` ) ⁵

[5 X {(52 X 5) - 10} + 50 of 20] = ?

35% of 500 × 22% of ? = 847

43.5 × [1/7 × (91 - 49) + 17(1/3)] = ?

654.056 + 28.9015 × 44.851 – 43.129 =?

84367 + 65441 + 32645 – 21145 – 10769 = ?