Who was elected as the President of the Indian Steel

Find the value of (x + y)² - (x - y)², where x = 15 and y = 7.

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

[ (7/8 of 256) ÷ 14 ] × 9 = ?

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

2 x ? - 180 ÷ 36 = 25% of 200 - √625

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

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

25% of 2000 – 50% of 500 = 100% of ?

 (5/8) × 480 + (3/9) × 450 = (5/2) × ?

(8² + 6² ) × 1.25 + 20% of 145 = ? – 40% of 65 

√10000 x √8100 - (50)² = √(?) + (80)²

Evaluate:

7.5 + 12 ÷ (4 × 1.5) − 2.4