The numbers are 972, 938, 895, 863, 692, 536. If all the digits within each number are multiplied, how many of the resulting numbers will be less than 200?
Correct answer: D. 4
- A. 1
- B. 2
- C. 3
- D. 4
Explanation
Multiplying the digits of each number gives: 9×7×2=126; 9×3×8=216; 8×9×5=360; 8×6×3=144; 6×9×2=108; 5×3×6=90. The numbers 126, 144, 108, and 90 are all less than 200, so there are four such numbers.
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About Respiration
The human respiratory system includes the air passages, lungs, alveoli and breathing muscles, while gaseous exchange explains how oxygen enters blood and carbon dioxide leaves it by diffusion. The effects of smoking include damage to cilia and alveoli, reduced gas exchange, chronic bronchitis, emphysema and increased risk of lung cancer.
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