Quantitative Aptitude - Arithmetic Ability Questions

Iftan 450=cot∅, then the value of ∅, in radians is 

If one angle of a triangle is equal to half the sum of the other two equal angles, then the triangle is

Find the mean value of 2, 3, 3, 4, 6, 7

A train runs at 80 kmph for the first 40 km and the next 30 km at 60 kmph. Find the average speed.

Which among the following is true for the given numbers?

If in 2 years at simple interest the principal increases by 18%, what will be the compound interest (in Rs) earned on Rs 7000 in 3 years at the same rate?

What is the area (in sq cm) of an equilateral triangle of side 14 cm?

In the following question, four number pairs are given. The number on left side of (–) is related to the number of the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.