Quantitative Aptitude - Arithmetic Ability Questions

Which of the following is not true for a rhombus?

A 600 metres long train is running at the speed of 81 km/hr. If it crosses a platform in 40 seconds, then what is the length of the platform (in metres)?

In the following question, four groups of three numbers are given. In each group the second and third number are related to the first number by a Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

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.

The 3rd and 8th term of an arithmetic progression are -14 and 1 respectively. What is the 11th term?

The length of the base of an isosceles triangle is 2x­2y+4z, and its perimeter is 4x­2y+6z. Then the length of each of the equal sides is

Ravi had five subjects in his final examination. The maximum marks in each subject are 100. If his percentage in four subjects is 80, and he scores 65 marks in the fifth subject, determine his overall percentage for the five subjects.

What is the HCF of 36, 72 and 126?