Exams

The sum of the ages of husband and wife at present is 100. Ten years ago the ratio of their ages was 9:7. What is the age of the husband?

If (x + y + z) = 12, xy + yz + zx = 44 and xyz = 48, then what is the value of x3 + y3+ z3?

If A = 1, AND = 19, then ANT = ?

Improve the bracketed part of the sentence.
I don't want an award (for help to you).

In the following question, out of the four alternatives, select the alternative which is the best substitute of the words/sentence.

Extremely happy, peaceful, or picturesque

(1 + sec 20° + cot 70°)(1 - cosec 20° + tan70°) is equal to

A person crosses a 900 metres wide road in 120 seconds. What is his speed (in km/hr)?

A dishonest milkman buys milk at Rs 30 per litre and adds 1/5 of water to it and sells the mixture at Rs 32 per litre. What will be his gain?