Which one is the example of Peripheral

What will come in place of (?) in the given expression.

(3/4 of 64) + (1/2 of 48) = ?

3% of 842 ÷ 2% of 421 = ?

What will come in the place of question mark (?) in the given expression?

(437 + ? - 167) x 2.5 = 875

What will come in the place of question mark (?) in the given expression?

(96 - 59) X 6 + ?² = 136.5 X 4

135÷ 15 x 19 + 14807 = ? + √3249 - √9604

1120 / √x = 80 Then x = ?

(21 X 5) + ? = (480 - 120) ÷ 3

20 + 160/? × 20 = 420

1428 ÷ 17 = ? % of 120

84% of 8400 + 42% of 6120 =?