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Helium is a noble gas, which is a group of elements known for their low reactivity due to their stable electron configurations. Noble gases are colorless, odorless, and have very low boiling points. Oxygen (O) is a non-metal element essential for life and is commonly found in the atmosphere. Hydrogen (H) is a non-metal element and the lightest element in the periodic table. It is not a noble gas. Carbon (C) is a non-metal element and is the basis of organic chemistry.
Find the approximate value of Question mark(?) for given equation.
(71.92% of 149.99) ÷ 12.04 + 107.98 = ?
12.99% of 499.99 ÷ 13.17 = ? ÷ 20.15
(2310.23 ÷ 32.98) + (1008.32 ÷ 23.9) + 1594.11 = ?
?% of 549.83 – 18.05 × 31.96 = 44.94% of 479.84 – 13.98 × 33.13
19.87% of (49.68 × ?) = 19.78% of 1099.87
A can complete a piece of work in 15 days. B is 30% more efficient than A. If they work together, how many days will it take to complete the work?
30.11% of 149.99 + √195.97 ÷ 7.02 = ?
1560.182 ÷ √168 + √143 * √224 – 4649.87 ÷ 30.883= ?
(3/5) of 3025 + (18² + 12²) = ? + 22.22% of 1125