jake wrote a test that had 30 questions. if 12 of the questions were marked wrong find the number of questions that were marked

Jake wrote a test that had 30 questions. If 12 of the questions were marked wrong, find the number of questions that were marked right. => 18 or 42 or 28 or 22..

Introduction - Let us consider the marks obtained by four students in Physics, Chemistry and Biology for the first unit test. We have represented the data in rows and columns. (i) Rows show the marks obtained by each student. (ii) The columns show the marks i..

1. Problems involving rational numbers are simplified using 'BODMAS' rule. 2. A rational number can be represented in the decimal form. 3. When a rational number is represented as a decimal, it will be either a terminating decimal or a recurring decim..

>All surds are irrational numbers. Rational numbers and irrational numbers together form the set of real numbers. All rational and irrational numbers can be marked on the number line. Numbers with surds in the denominat..

) It is not possible to find the exact value of an irrational number. (iii) All rational and irrational numbers can be marked on the number line. Write two possible irrational numbers between 2 and 3. Consider the squares of 2 and 3 and 5 ..

From (1) and (2) (A + B) + C = A + (B + C) verify the associative la..

Find the ratio of 2 hours 30 minutes to 45 minutes. 2 hours 30 minutes = 150 minutes ratio is 150 minutes : 45 minutes or 10:3 Ans: 10 : 3 Simplify the ratio can be rewritten as or 9 : 5 Ans: 9 ..

= 12 : 7 Sub-triplicate ratio of 9261 : 729 = = 21 : 9 Reciprocal ratio of 16 : 15 = 15 : 16 Compounded ratio = 15 : 4 Ans: 15 : 4 Find the compounded ratio of the following: Sub-duplicate ratio of x 4 y 6 : 81a 4 , Triplicate ratio of 3a : 2xy 2 , and Sub-triplicate ratio of 64..

Question: Four numbers are in AP. Sum of the first three is 21 and sum of last three is 30. Find the numbers. Answer: Let the numbers a - 3d, a - d, a + d, a + 3d be in AP. ..

The number of significant figures depends on the instrument used and accuracy required. It is wrong to record diameter as 2 cm. It means the reading is approximated to the nearest 1 cm. If the exact reading is 2 cm then it should be recorded as 2.0 cm. The sign..