What is so special about these grids? Is the magic in the numbers or the way. Class 7
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What is so special about these grids? Is the magic in the numbers or the way. Class 7
Question 1.
What is so special about these grids? Is the magic in the numbers or the way they are arranged or both? Can you make more such grids? Class 7
Solution:
Product of the circled numbers comes out the same. These numbers have been arranged in a special way. For example, 8, -4; 12, -6, -28, 14, and so on. Yes.
Question 2.
Find the values of: Class 7
(a) 14 × (- 15)
(b) - 16 × (- 5)
(c) 36 ÷ (- 18)
(d) (- 46) ÷ (- 23)
Solution:
(a) -210
(b) 80
(c) -2
(d) 2
Question 3.
A freezing process requires that the room temperature be lowered from 32°C at the rate of 5°C every hour. What will be the room temperature 10 hours after the process begins? Class 7
Solution:
32°C - 10 × 5°C = 32°C - 50°C = 18°C.