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NTSE SAT Quiz-13 (Maths) / Class 8 Maths

NTSE SAT Quiz-13 (Maths)

**Q1: One third of a number is greater then one fourth of its successor by 1, find the number.**
(a) 5

(b) 15

(c) 20

(d) 25

**Q2: In a rhombus ABCD, **∠**A = 60° and AB = 6cm then length of diagonal BD in cm is ...**
(a)

12
(b) 9
(c) 6
(d)

3^{}
**Q3: The multiplicative inverse of 2/3 is**
(a) 3/2

(b) -2/3

(c) -3/2

(d) 1/3

**Q4(NTSE Stage I): x, y and z are three sums of money such that y is the simple interest on x. z is the simple interest on y for the same value of time and same rate of interest. The relation among three sums are:**
(a)

x^{2} = yz

(b)

y^{2} = xz

(b)

z^{2} = xz

(d) xyz = 1

**Q5: If CP of an article is Rs. 200 and gain in percentage is 5%. Then gain is:**
(a) Rs 5

(b) Rs 10

(c) Rs 15

(d) Rs 20

**Q6: The factors of 2n**^{2} – 6n are:(a) 2n and 6n

(b) (2n – 1) and (n – 3)

(c) 2n and (n – 3)

(d) (2n – 1) and (1– 3n)

**Q7: The perpendicular distance of a point from x-axis is called:**
(a) Abcissa

(b) Ordinate

(c) Mantissa

(d) Coordinate

**Q8. An ice-cream cone is an example of a**
(a) cube

(b) cuboid

(c) pyramind

(d) sphere

**Q9: There are 100 students in a dormitory. Food for all them is for 20 days. If 25 more students join them, then food available will last: **
(a) 4 days

(b) 16 days

(c) 20 days

(d) 25 days

**Q10: What is the probability of a team losing a game if the probability of the team winning a game is 0.745?**
(a) 1

(b) 0

(c) 0.255

(d) 1.255

**Q11: In a triangle ∆ABC, AB+BC = 10 cm., BC + CA = 12cm and CA + AB = 16cm. Fin dthe perimeter of ∆ABC in cm.**
(a) 19 cm

(b) 24 cm

(c) 32 cm

(d) 38 cm

**Q12: The point equidistant from the vertices of a triangle is called its ...**
(a) Cicumcentre

(b) Incentre

(c) Orthocentre

(d) Excentre

**Q13: From the following integers, the largest integer is?**
(a) -1111

(b) -111

(c) -11

(d) -1

**Q14: Here is a list of numbers 42.2, 28.4, 47.0, 36.4, 33.2, 40.4, 36.1 and 32.3. If the number 47 is replaced by 51 in the list, then the mean of the numbers is**
(a) 37

(b) 37.5

(c) 51.5

(d) 38.5

**Q15: What is the smallest number by which 13500 is to be multiplied to make the product a perfect cube?**
(a) 2

(b) 3

(c) 4

(d) 5

**Answer**:

1. (a) 15

2. (c) 6cm

3. (a) 3/2

4. (b)

y^{2} = xz

5. (b) Rs 10

6. (c) 2n and (n – 3)

7. (b) Ordinate

8. (c) pyramind

9. (b) 16 days

10. (c) 0.255

11 (a) 19cm

12 (c) Orthocentre

13 (d) -1

14 (b) 37.5

15 (a) 2

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ReplyDeleteHey, could anyone explain to me how to calculate the solution of the 2nd one

ReplyDeleteBD should be 6cm. (answer updated)

DeleteIn a rhombus all sides are equal. i.e. AB = BC = CD = AD = 6cm.

See triangle ABD is an isosceles triangle. AB = BD. Thus ∠ADB = ∠ABD

Since ∠A = 60, using angle sum property, ∠ADB = ∠ABD = 60.

Thus triangle ABD is an equilateral triangle. Hence, BD = 6cm

could anyone tell me, how to do no.10

ReplyDeletehow to do the 1st one??

ReplyDelete