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

139 + 323 – √169 + ? = 450

Determine the simplified value of the given mathematical expression.

Simplify the following expression:

    (525 +175) ² - (525 – 175) ² / (525 × 175)

420 ÷ 7 + 140 % of 20 + ? × 13 = 18 × 15

The valueof2 of5– 1/2 −[4÷2– 1/3 −{3/4−(5– 1/2 – 3/4 )}]is :

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

(6³ - ?) ÷ 5 + √625 = 19 X (9 - 6)

What value should come in place of (?) question mark.

[36% of 250 + (3/5 of 320) − 18] ÷ 6 = ?

Evaluate: (936 ÷ 12) × (225 ÷ 15) − (144 ÷ 12) × 18

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