Quantitative Aptitude - Arithmetic Ability Questions

In the following question, four number pairs are given. The number on left side of (–) is related to the number on 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 options.

What is the obtuse angle formed by the hands of a clock when the time in the clock is 2:30?

A circle has points P, Q, R on a circle in such a way that angle PQR is 60 deg and angle QRP is 80 deg. Calculate the angle subtended by an arc QR at the centre.

If the equations 6x - 5y + 11 = 0 and 15x + ky - 9 = 0 have no solution, then the value of k is:

Mohan starts to calculate sum of all odd natural number less than 83. What result does he get?

ΔPQR is right angled at Q. If cosecP = 25/24, then what is the value of cotR ?

In the following question, select the odd word from the given alternatives.

If 2x - 6 ≤ x - 3 and 1+3x < 4x + 4, then x can take which of the following values?