Quantitative Aptitude - Arithmetic Ability Questions

An article was sold at Rs. 950 allowing 5% discount on the marked price. The marked price of the article is

Find the odd word/letters/number pair from the given alternatives.
(A) 52­61 (B) 43­54 (C ) 72­83 (D) 18­29

If 2 cos θ = 2 – sin θ, then what is the value of cos θ?

Calculate the value of 61681 x 61681 - 31681 x 3168130000?

What is the value of x3-1x3+8 when 8x-8x-16=0 ?

At 30% discount the selling price of an article is Rs 1050. What is the selling price (in Rs) if the discount is 15%?

The average marks obtained by a class of 60 students is 65. The average marks of half of the students is found to be 85. The average marks of the remaining students is

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