1. In a competitive exam of 40 questions, +3 marks is awarded for a correct answer and — 1 for evenr incorrect answer. Find the total score if a student had 11 wrong
answers in his attempt of all questions.
2. Write the sign of the following products:
...8 times
. 99 times.
3. A medical shop owner, gains 3 on selling each face mask and loses 2 on
selling each sanitizer. In a particular week, she sells 50 masks and some
sanitizers, losing 10 in all. How many sanitizers does she sell?
4. Find the product using suitable properties: (Mention the properties also)
a. x (-1) x 75 x (-25)
b. 632 x 2 + (-98) x (-632)
5. Evaluate:
a. [(-16) + 12] * [4 +
b. -73 * [(-41) + (-32)]
C. 15 x (-10) x 16
d. 100 (-200) - 50
6. Subtract the sum of 5000 and
173 from 4910.​