Quantitative Aptitude - Arithmetic Ability Questions

Which of the following is a Pythagorean triplet?

The measures of the four angles of a quadrilateral are in the ratio 1:2:4:5. What is the measure of the biggest angle?

In what ratio must a mixture of 11% sugar strength be mixed with that of 25% sugar strength so as to get a new mixture of 13% sugar strength?

If the number x4562 is divisible by 9, what is the face value of x?

Each exterior angle of a regular polygon measures 9 deg. How many sides does the polygon have?

What is the digit in unit's place of the product 51 x 52 x 53 ...... 59?

The cost of one dozen bananas is Rs.5. The cost of one dozen oranges is Rs.75. What will the cost of one and a quarter dozen bananas and three-fourth dozen oranges?

In the following question, select the odd letter/letters from the given alternatives.