Question
The nitrifying bacteria
areÂSolution
Nitrifying bacteria are Chemoautotrophs, as they use inorganic energy sources to synthesize organic compounds, that are important in the nitrogen cycle as converters of soil ammonia to nitrates, compounds usable by plants.
√1936 + √3025 = ? % of 220
1231 + 1312 + 2113 – 3211 = ?
√324 * 6 – 20% of 180 + ? = 130% of 150
?/4 ÷ 9/? = 15% of 800 + `1(2/3)` × `1(1/5)` × 1/2
What will come in the place of question mark (?) in the given expression?
(87 + 79) X √9 - 298 = ? + √3600
12% of 10% of 15% of 5000 + (12 x 15) = ?
5490 ÷ 15 × 18 + 450 = ?
- What will come in place of (?) in the given expression.
(⅗ of 450) – (⅖ of 300) = ? 
√ [? x 11 + (√ 1296)] = 16