The table shows the distribution of the ages of 25 students.

What is the probability that a student chosen at random is AT LEAST 13 years old?

Adding mineral water to anhydrous copper sulphate turns it:

Alcohol can be separated from beer using:

This question refers to the triangle PQR in which angle QPR = 90°, PR = 12 cm and PQ = 5 cm.

The length of QR, in cm, is

Instructions: Choose the one NEAREST in MEANING to the original sentence.

The news shocked me so much that I almost forgot what I wanted to say.

-7 - (-3) =

Which of the following nutrients is/are digested in the stomach?

The white blood cells that produce antibodies are called:

Which one of the following best compares the eye and a camera?

In a simple reflex action:

The halogen used to make bleach is called:

Hydrochloric acid forms salts called:

In electrolysis the anode is the:

Which of the following tests describes the test for glucose?

Which of the following statements about photosynthesis is NOT true?

The average of a set of numbers reduces from 14 to 11 when the number 35 is removed. How many numbers were in the original set?

If ƒ : x → x² + 1, then ƒ(-3) is

The monomer used to make poly (propene) is called:

Mrs. Green is a dry goods merchant. Which of the following transactions would result in a debit to her Cash Account?

Water reabsorption is controlled by: