1. If a = -3, b = 2, c = -1, and d=1., what is the value of ab + bc –cd - abcd ?

If a©b means “multiply both of number, then the result subtracted with four times first number”, what is the value of 4©-3?

If ‘*’ means “ multiply first number with –6, and add with three times second number. What is the value of (-3)*(-2)?

A mathematics Competition consist 40 multiple choice questions. 4 marks are awarded for a correct answer while –2 marks is deducted for a wrong answer. Negative 1 marks will be awarded or deducted for questions not attempted. The student get 32 correct answers and 5 wrong answers. Find the score’s student obtained!

A test comprises of 30 questions and for each correct answer, the candidate is awarded 4 marks. There will be a negative marking of 2 marks for every wrong answer. Negative 1 marks can be deducted for every unanswered question. A student answer 26 questions and get score 88. Find the number of correct answers obtained!

The temperature in a room was 10⁰C below zero and it went up 4⁰C every 15 minutes. What was the temperature in the room after 2 hours?

(-3) х (-4) х (-8)

(-2) х 0 х (-16)

(-122) : (-2)