\(40\)
\(45\)
\(43\)
\(54\)
Solution: Observing the pattern in the first two triangles, we can deduce a rule to find the central number based on the surrounding numbers.
1. In the first triangle: - Numbers: 5, 6, and 4 - The central number (34) can be calculated
\(5 × 6 + 4 = 30 + 4 = 34\)
2. In the second triangle: - Numbers: 9, 2, and 8 - The central number (26) can be calculated as:
\(9 × 2 + 8 = 18 + 8 = 26\)
Following the same pattern in the third triangle: - Numbers: 7, 6, and 3 - The missing central number (?) is calculated as:
\(7 × 6 + 3 = 42 + 3 = 45\)
Thus, the correct answer is 45.
Rearrange the following parts to form a meaningful and grammatically correct sentence:
P. that maintaining a positive attitude
Q. even in difficult situations
R. is essential for success
S. and helps overcome obstacles effectively
Rearrange the following parts to form a meaningful and grammatically correct sentence:
P. a healthy diet and regular exercise
Q. are important habits
R. that help maintain good physical and mental health
S. especially in today's busy world
What comes next in the series?
\(2, 6, 12, 20, 30, \ ?\)
If x + 1/x = 5, what is the value of x² + 1/x²?