Statistics-Mean

In computing a mean of 8 numbers, a boy mistakenly used 17 instead of 25 as one of the numbers and obtained 20 as mean. Find the correct ...
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Age problem

If x/2 years ago John was 12 years old, and x/2 years from now he will be 2x years old, what will be his age 3x years from now?
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Logarithm

Prove that: log base 16 (XY) = 1/2 log base 4 (X) + 1/2 log base 4 (Y) Include the logarithmic rules used to prove the statement.
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Word problem

A garrison of 120 men is provisioned for 24 weeks at 350 gm per day per man. How many men must leave so that the same provision may last...
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Logic Time

There was war in a certain village and a man, his wife and two sons were trying to cross to the other side of the river so that they...
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Exponential

Question source : Facebook que source ( × 10 to power 3)÷(7×10 to the power of-3) -5×10 to the power of-4 + × 10to power of-3 Evaluate the answer...
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SCIENCE

Which one of the metal is liquid at normal temperature- a) zinc b) mercury c) sodium d) water
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SCIENCE

The least distance of distinct vision for a young adult with normal vision is about a) 25 m b) cm  c) 25 cm d) m
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science

The far point of a myopic person is 80 cm in front of the eye . What is the nature and power of the lens required to correct the...
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