Find the unknown number?
20 13 07
30 08 22
40 ? 28
10
12
16
20
Explanation:
20-13=7
30-8=22
40-12=28
ans:12
Next Question
The diameter of a circle is 10 cm. "P" is the point lying outside the circle. From that point "P” two tangents are drawn to the circle. The length of each tangent is 12 cm. What is the distance between "P" and the centre of the circle.