Quantitative Aptitude - Arithmetic Ability Questions

If the product of two numbers is 4941 and their LCM is 81, then their HCF is :

By increasing the price of entry ticket to a fair in the ratio 11:16, the number of visitors to the fair has decreased in the ratio 19:9. In what ratio has the total collection increased or decreased?

What is the LCM (least common multiple) of 57 and 93?

What is the value of cosec -7π/6?

A batsman scores 98 runs in the 17th match of his career. His average runs per match increased by 2.5. What is his average before the 17th match?

The maximum value of 5+20x-4x2, when X is real number

If Sec θ = 25/24 , then what is the value of Sin θ?

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.