Question

MENTAL MATHS
1. Choose the correct answer
(a) What is the ratio of 60 kg to 6,000 g?
(i) 60 : 1
(ii) 10:1
(ii) 1:10
(iv) 1:6
(b) Which of the following are in proportion?
(1) 2,3,5,6 (ii) 1, 3, 2, 3 (iii) 1, 3, 4, 12 (iv) 6,3,47
(c) If 12:24 = 72:x, what is the value of x?
(i) 148
(i) 124
(ii) 120
(iv) 144
(d) What is the simplest form of the ratio 35: 1202
(i) 7:24 (ii) 5:20
(ii) 7:12
(iv) 9:24
2. Write True or False.
(a) The ratio between 10 kg and 100 kg is 1 : 10,
(b) The value of a ratio does not change if both the terms are multiplied by the same
number. T
(c) Ifa : b = 9:7 and b c = 7:61, then a, b, c are in continued ratio
(d) If a man takes 17 days to complete a work, then the work done by him in 1 day is
(e) If increase in one quantity causes decrease in the other quantity, then the​

Answer 1

Answer:

25253727181825353673838263829192736+4738292353637383634537474646373838382818171772729202983=374749446474483928276464748467346646464557576-383637383747482919263393+3846479493829302022=27383938366383839323333449444+48484849494

Answer 2

Answer:

Step-by-step explanation:

60kg : 6,000g

= 60,000g : 6,000 g

= 60,000/6,000

=10/1

=10:1

therefore A) (ii)

B) (iii)

C) 12 : 24 = 72: x

Product of mean = product of extreme

24 × 72 = 12x

24 × 72 / 12 = x

so x = 144

so C) (iv)

D) (ii) 7:12

2. (A)True

   (B)True

   (C)Sorry I don't know this

   (D)1/17

   (E)Question incomplete