[PP Sub Inspector 17 Aug 2021]
6. When an integer A is divided by 8, then it gives remainder 3. What will be the remainder if 6A is divided by 8 ?
2
0
3
1
7. The length of each side of a cube is 7 cm. What is the total surface area of the cube?
252 cm2
343 cm2
294 cm2
42 cm2
8. The LCM of two prime numbers a and b (a > b) is 141. What is the value of 5b-2a?
97
-47
-79
80
9. Which of the following options gives the correct formula for finding the roots of a quadratic equation of the form ?
\(ax^2 + bx + c = 0\)
\(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\)
\(x = {-b \pm \sqrt{b^2-ac} \over 2a}\)
\(x = {-b \pm \sqrt{b^2-6ac} \over 2a}\)
\(x = {+b \pm \sqrt{b^2-4ac} \over 2a}\)
10. An item was sold at a profit of 12%. Had the item been sold for ₹ 180 more, the profit would have been 18%. The cost price of item was:
₹ 1800
₹ 1500
₹ 1200
₹ 3000