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Start learning 50% faster. Sign in nowJack Dorsey got the idea for Twitter when he wondered if someone could build a simple but interesting application that would let a person know what his or her friends were up to at any given time.
What will come in the place of question mark (?) in the given expression?
(30 × 5 + 20) × 2 = ?
?2 × 25 = 42 × 21 + 172
(? + 2180) ÷ 69 × 5 = 450
24% of 15% of 500 + 122 = ?2 – (232 ÷ 2)
{(300 ÷ 15)% of 1500} ÷ 6 = ? + 120
20% of 10% of 900 + 84/12 = ?2
(144 ÷ 4)² × (72 ÷ 12)³ = 12 ×? × (25920 ÷10)
Calculate the value of x2, if [(8 + 62) ÷ 4 of x + 2.5 × 5 = 42 + 20% of 10].
26 X √25 + 15 - 80% of 120 = ?2
