JNV-MATHEMATICS CLASS 9th (2021)

Questions in this test

1. 25450 expressed in standard form is
2. In 15 days, the Earth picks up $12\times 10^8$ kg of dust from the atmosphere. In how many days will it pick up $4.8\times 10^8$ kg of dust?
3. The cube of the number $x$ is nine times $x.$ The value of $(where\ x\ \ne =0\ and\ x\ne −3)$ is
4. The value of $\left[\left(5^{-1}-6^{-1}\right)^{-1}-\left(3^{-1}-4^{-1}\right)^{-1}\right]$
5. A camp having 80 inmates, has food. sufficient for 70 days. How many inmates should leave after 10 days so that the remaining food lasts another 80 days?
6. If $x=\frac{2}{3}\ and\ y=\frac{3}{2}$ than the value of $(x +y) \div (x -y)$
7. The sum of four consecutive multiples of 7 is 322. Find the smallest multiple involved.
8. Factorising $15xy (x-3y) - 3y (x- 3y)$ gives
9. $\left(761\right)^2-\left(239\right)^2=?$
10. 27 when added to twice a number $x,$ and then increased by 13, gives us 60. The value of $x$ is
11. When expanded, the expression $\left(a+2b-c\right)^2$ is equal to
12. How many carpets of dimensions 3m x 2m are required to cover the floor hall, whose dimensions 30m x 12m ?
13. A metallic cylindrical pipe has an outer radius of 3cm and an inner radius of 2 cm. If the length of the pipe is 70cm, then the volume of metal in the pipe, in cm³ is
14. If the base and height of a triangle are both doubled, then the area will be ____________ the original triangle.
15. The radii of two cylindrical vessels are in the ratio 1:3 and their heights are in the ratio 1:2. The ratio of their volumes is
16. Out of the following rational numbers, which is the smallest?
17. Which of the following statements is true?
18. $\frac{21}{24}\times \frac{8}{7}$ is equal to
19. Three is subtracted from a number $(x).$ When this difference is multiplied by 4, the product is 20. This question is
20. In a quadrilateral, the sum of three angles is equal to twice its fourth angle. The measure of the fourth angle is
21. The solution of the linear equation $\frac{2x-3}{4}-\frac{2x-1}{2}=\frac{x-2}{3}$ is
22. In a quadrilateral ABCD, if AB = 10 cm, CD = 6 cm and ㄥA +ㄥD = 180° , then what type of quadrilateral is ABCD?
23. A die is rolled. The probability of getting a number greater than 1 and odd is
24. Out of 15 students who participated in a debate, 5 are Girls. The probability that the winner is a boy is
25. A survey of 300 people found that 30 of them play cricket. In a pie-chart, what would be the sector angle of this group?
26. Two squares of area is $16cm^2$ and $36cm^2$ are placed adjacent to each other to form a new shape. The perimeter of this shape is
27. What must be added to 269 to make that result a perfect square?
28. Three metallic solid cubes of sides 6cm, 8cm, and 10cm are melted to form a single cube. The length of edge of the new cube is
29. The smallest number that should be added to or subtracted from the sum of the squares of 9 and 10 to make it a perfect square is
30. $\left[\sqrt{\left(24\right)^2+\left(7\right)^2}\right]^3$ is equal to
31. If 5 men can do a piece of work in 28 days, then the number of persons required to do the same work in 7 days is
32. Manu Buys a pressure cooker at $\left(\frac{9}{10}\right)^{th}$ of its marked selling price and sells it at 8% more than its market selling price. What is her gain percent?
33. Samir purchased a pair of shoes for ₹ 1,344 including GST. If the sale price of the shoes is ₹ 1,200, then the rate of GST is
34. The population of a city first increased by 10% and then decreased by 20%. The net decrease in the population is
35. If a number is increased by 20% and then decreased by 20%, then the net increase/decrease percentage will be