Quantitative Aptitude - Arithmetic Ability Questions

What is the value of cosec -7π/6?

What approximate value should come in place of the question mark (?) in the following questions? (You are not expected to calculate the exact value.)

21.003 × 39.998 –209.91 = 126× ?

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.

If x + √5 = 5 + √y, and x, y are positive integers, then the value of x+yx + y

A truck moves at the speed of 90 km/hr after repairing and moves at the speed of 80 km/hr before repairing. It covers x distance in 8 hours after repairing. How much time (in hours) will it take to cover 4x distance before repairing?

A school has 8 periods of 45 minutes each, every day. How long will each period be if the school has to have 9 periods everyday, assuming the working hours to be the same?

O is the circumcentre of ΔABC. If AO = 8 cm, then the length of BO is

If x+1/x = 2, then the value of x7+2/x6 is equal to?