Question
What is the primary source of energy in an ecosystem?
Solution
The sun is the fundamental source of energy for most ecosystems, providing the energy necessary for photosynthesis and supporting life on Earth.
If 1210 ÷ 22 + 1332 ÷ 37 - y + 54 × 3 = 980 ÷ 20 × 144 ÷ 48, then the value of y is:

1549.8 ÷ 8.2 + 65.6 × 55 = (? × 4) + (42 × 30.5)
What will come in place of the question mark (?) in the following expression?
46 – 5² + 8² + 3² = ? × 4
72% of 400 – 23% of 1020 = 120% of ?
Simplify: (23×32) ÷6
Simplify the following questions:
(11) 8.5 × (121) 5.5 ÷ (1331) 5.5 = (11) ?
...The sum of two numbers is 16 and their product is 63. The sum of their reciprocal is equal to:
- Simplify the following expression:
16 + [17 - (8 + 11) + 6 - 3] ÷ 0.2 58% of 3300 - ?% of 2900 = 1740