Exams

The average of marks of 17 students in an examination was calculated as 71. But it was later found that the mark of one student had been wronglyentered as 65 instead of 56 and another as 24 instead of 50. The correct average is

In the following question, out of the four alternatives, select the alternative which best expresses the meaning of the idiom/phrase.

saved by the bell

The point of intersection of all the three medians of a triangle is called its

In ΔABC measure of angle B is 900. If cotA = 8/15, and AB = 0.8cm, then what is the length (in cm) of side BC?

Look at the underlined part of each sentence. Below each sentence are given three possible substitutions for the underlined part. If one of them (a), (b) or (c) is better than the underlined part, indicate your response on the Answer Sheet against the corresponding letter. If none of the substitutions imporves the sentence, indicate (d) as your response on the Answer Sheet.

The man disappeared after he was rescuing a boy from drowning.

Improve the bracketed part of the sentence.
He thanked me for what I (have done) for his wife.

How many numbers are there from 2000 to 7000 which are both perfect squares and perfect cubes?

The population of a town increases by 5% in the first year, by 6% in the second year and by 8% in third year. The present population of town is 120204. What was the population of the town 3 years ago?