Math, asked by manaswini708, 4 months ago

1.The numerator of the rational number 3/5 is *

(a) 3

(b) 5

(c) 2

(d) 8

2.The numerator of the rational number 1/100 is *

(a) 100

(b) 1

(c) 10

(d) 99

3.If 3/4 = ?/12, then ? = *

(a) 3

(b) 6

(c) 9

(d) 12

4.if 4/5 = 12/?, then ? = *

(a) 5

(b) 10

(c) 15

(d) 25

5.Which of the following is a negative rational number? *

(a) 1/2

(b) 3/4

(c) −4/−5

(d) 2/−3

6.The rational number −21/28 in standard form is *

(a) −3/4

(b) 3/4

(c) 3/7

(d) −3/7

7.Which of the following rational numbers is not equivalent to 7/−4 ? *

(a) 14/−8

(b) 21/−12

(c) 28/−16

(d) 7/−8

8.7/12 ÷ ( –7/12) = *

(a) 1

(b) -1

(c) 7

(d) -7

9.The ages of father and son are 45 years and 10 years. The ratio of their ages is *

(a) 3 : 2

(b) 5 : 2

(c) 9 : 2

(d) 15 : 2

9.The cost of 3 envelopes is ₹ 15. Find the cost of 5 envelopes. *

(a) ₹ 20

(b) ₹ 25

(c) ₹ 30

(d) ₹ 40

10.The cost of 7 kg of potatoes is ₹ 42. How many kg of potatoes can be purchased for ₹ 96? *

(a) 10 kg

(b) 12 kg

(c) 15 kg

(d) 16 kg

11.The cost of 4 m of cloth is Rs 40. Find the cost of 9 m of cloth. *

(a) ₹ 90

(b) ₹ 60

(c) ₹ 50

(d) ₹ 40

12.A motorcycle goes 120 km in 3 l of petrol. How much petrol will be required to go 600 km? *

(a) 10 l

(b) 12 l

(c) 15 l

(d) 20 l

13.5/2 as per cent is *

(a) 125%

(b) 150%

(c) 200%

(d) 250%

14.0.1 as per cent is *

(a) 1%

(b) 10%

(c) 100%

(d) 0.1%

15.Out of 40 children in a class, 10 are boys. What is the percentage of boys? *

(a) 10%

(b) 40%

(c) 4%

(d) 25%

16.Out of 25 students, 5 are absent. What per cent of the students are absent? *

(a) 10%

(b) 20%

(c) 25%

(d) 30%

17.What is 5% of 200? *

(a) 2

(b) 5

(c) 10

(d) 100

18.There are 40 children in a class. 25% like playing football. How many children like playing football? *

(a) 10

(b) 20

(c) 30

(d) 40

19.A shopkeeper bought a table for ₹ 500 and sold it for ₹ 400. Find the loss percentage. *

(a) 10%

(b) 20%

(c) 40%

(d) 50%

20.The interest on a sum of ₹ 2500 for 4 years at the interest rate 4% is *

(a) ₹ 100

(b) ₹ 200

(c) ₹ 300

(d) ₹ 400

21.The symbol for congruence is *

(a) ≡

(b) ≅

(c) ↔

(d) =

22.For two given triangles ABC and PQR, how many matchings are possible? *

(a) 2

(b) 4

(c) 6

(d) 3

23.‘Under a given correspondence, two right-angled triangles are congruent if the hypotenuse and a leg of one of the triangles are equal to the hypotenuse and the corresponding leg of the other triangle.’The above is known as*

(а) SSS congruence of two triangles

(b) SAS congruence of two triangles

(c) ASA congruence of two triangles

(d) RHS congruence of two right-angled triangles

24.We want to show that ∆ ART = ∆ PEN. We have to use SAS criterion. We have ∠ T = ∠ N, RT = EN. What more we need to show? *

(a) PN = AT

(b) PN = AR

(c) PN = RT

(d) None of these​

Answers

Answered by hemlata741388
5

Answer:

the numerator of the rational number3/2 is

(a) 3

(b) 2

(c) 5

(d) 1

Answered by HanitaHImesh
0

The answer to the given questions are following:

  1. The numerator of the rational number 3/5 is 3 (option a) because the number above the sign,'/', is the numerator and the number below it is the denominator.
  2. The numerator of the rational number 1/100 is 1 (option b).
  3. If 3/4 = ?/12, then the number in place of '?' is 9 (option c) because using the cross multiplication method, we have 3×12 = 4×?. To find the value of '?', we have to divide (3×12) by 4.
  4. If 4/5 = 12/?, then the number in place of '?' is 15 (option c). Because using the cross multiplication method, we have 4×? = 5×12. And then to find the value of '?' we have to divide 60 by 4.
  5. 2/-3 is the negative rational number (option d) because all other numbers either have a positive numerator as well as a denominator or both of them are negative.
  6. The rational number −21/28 in standard form is -3/4 (option a) because both the numerator and denominator can be divided by 7.
  7. 7/-8 is not the equivalent rational number of 7/-4 (option d) because we get two different numbers by dividing the numerators and denominators of the fractions (1 and 2).
  8. The value of 7/12 ÷ -7/12 is -1 (option b) because it can be solved by inverting the second fraction and changing the sign of division into the multiplication. 7/12 × -12/7 = 1.
  9. The ratio of their ages is 9:2 (option c) because 45 and 40 can be divided by 5.
  10. 16 kg potatoes are purchased for Rs. 96 (option d) because the cost of 1 kg potatoes is Rs. (42/7) which is Rs. 6. So, dividing 96/6 we have the number 16.
  11. The cost of 9 m cloth is Rs. 90 (option a) because the cost of 1 m cloth is Rs. (40/4) which is Rs. 10.
  12. 15 l of petrol is required to cover 600 km (option c) because 1 km of distance requires 3/120 l and 600 km will require (3/120×600) which is 15 l.
  13. 5/2 as a per cent is 250% (option d).
  14. 0.1 as a per cent is 10% (option b) because to find the percentage we multiply the number by 100.
  15. 25% are boys in the class (option d) because it is found by (10×100/40).
  16. 20% are absent (option b).
  17. 10 is the 5% of 200 (option c). [ 5×200/100]
  18. 10 students play football (option a) [ 25×40/100]
  19. 20 is the loss% (option b) because the formula to find the loss % is (loss×100/cost price).
  20. The interest is Rs. 409 (option d) because the formula to find the interest is (principal × rate × time)/100.
  21. The symbol of congruence is given in option b.
  22. Not an appropriate figure was provided.
  23. RHS congruence of two right-angled triangles (option d).
  24. We need to show PN = AR (option b).

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