# OPCW Interview Questions

###### 105 * 99 * 299 = ? A. 785600 B. 315000 C. 845000 D. 442000
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###### What is the total surface area of a right circular cone of height 14 cm, and base radius 7cm. A. 498.35 cm² B. 598.35 cm² C. 698.35 cm² D. 398.35 cm²
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###### The true discount on a bill of Rs. 540 is Rs. 90. The banker’s discount is: A. Rs. 102 B. Rs. 104 C. Rs. 106 D. Rs. 108
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###### A water tank is two-fifth full. Pipe A can fill a tank in 10 minutes and pipe B can empty it in 6 minutes. If both the pipes are open, how long will it take to empty or fill the tank completely ? A. 6 min, to empty B. 6 min. to fill C. 9min. to empty D. 9 min. to fill
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###### The average of first 10 odd numbers is? A. 10 B. 11 C. 12 D. 13
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###### One equation of a pair of dependent linear equations is –5x + 7y = 2. The second equation can be A. 10x – 14y = –4 B. 10x + 14y + 4 = 0 C. –10x + 14y + 4 = 0 D. –10x – 14y + 4 = 0
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###### How many 4-letter words with or without meaning, can be formed out of the letters of the word, ‘LOGARITHMS’, if repetition of letters is not allowed? A. 5040 B. 0405 C. 405 D. 5004
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