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
5
Answer:
the numerator of the rational number3/2 is
(a) 3
(b) 2
(c) 5
(d) 1
Answered by
0
The answer to the given questions are following:
- 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.
- The numerator of the rational number 1/100 is 1 (option b).
- 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.
- 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.
- 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.
- 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/-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).
- 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.
- The ratio of their ages is 9:2 (option c) because 45 and 40 can be divided by 5.
- 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.
- 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.
- 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.
- 5/2 as a per cent is 250% (option d).
- 0.1 as a per cent is 10% (option b) because to find the percentage we multiply the number by 100.
- 25% are boys in the class (option d) because it is found by (10×100/40).
- 20% are absent (option b).
- 10 is the 5% of 200 (option c). [ 5×200/100]
- 10 students play football (option a) [ 25×40/100]
- 20 is the loss% (option b) because the formula to find the loss % is (loss×100/cost price).
- The interest is Rs. 409 (option d) because the formula to find the interest is (principal × rate × time)/100.
- The symbol of congruence is given in option b.
- Not an appropriate figure was provided.
- RHS congruence of two right-angled triangles (option d).
- We need to show PN = AR (option b).
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