How many electrons are involved in the oxidation by

24% of 15% of 500 + 122 = ?² – (232 ÷ 2)

(√ 121 x 41) + (³√343 x √289  ) = ? x 19    

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

12.5 + 7.75 - 3.6 = ?

√ 225 x 24 - √ 144 x 18 = ?

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

25% of 2000 – 50% of 500 = 100% of ?

20% of 450 - 15% of 400 = 25% of ?

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

[4(1/3) + 4(1/4)] × 24 – 62 = ?²

132 × 3 ÷ 11 + 67 − ? = 64 ÷ 8 × 2