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In August this year, Beijing saw its lowest ever PM2.5 on record, just 23 micrograms per cubic metre and all of that is because of the various steps they've taken.
Find the largest 5-digit number that is divisible by 12, 15, 18, and 24. Also, what is the remainder when this number is divided by 11?
If sin 28° = 15/17 , then tan 62° = ?
Three mixtures: A, B, and C containing 25%, 35%, and X% of water, respectively. If all these mixtures are mixed in the ratio of 1:3:2 to form a resultan...
If 2x + (1/9x) = 5, then find the value of 81x2 + (1/4x2) - (1785/4)
If x + y + z = 10 and x² + y² + z² = 36, then what is the value of x y + y z + z x?
If P3 + 3P2 + 3P = 7, then the value of P2+ 2P is –