CBSE Class 8 Mathematics Rational Numbers Worksheet Set 07

Question. At this point, P starts running at 5 m/sec while L continues to run at 4 m/sec. In how many seconds will P just catch up with L?
Six people - K, L, M, N, O and P are in a race. Their relative positions in the race at a particular instant are described below. Answer the question based on this. K is 10 metres behind L, L is 25 metres ahead of M, M is 5 metres behind O and N is 15 metres ahead of K. P is midway between K and L.
(a) 1
(b) 4
(c) 5
(d) 9

Answer : C

Question. Starting with the one who is first, what is their order at this point?
Six people - K, L, M, N, O and P are in a race. Their relative positions in the race at a particular instant are described below. Answer the question based on this :  K is 10 metres behind L, L is 25 metres ahead of M, M is 5 metres behind O and N is 15 metres ahead of K. P is midway between K and L.
(a) L-P- N- K- O- M
(b) N- L- K- P- M- O
(c) L- N- P- O- K- M
(d) N- L- P- K- O- M

Answer : D

Question. In a magic square, the sum of every row, column and diagonal is the same. Shown below is a 3 x 3 magic square: What is the value of 10x ?

(a) 60
(b) 40
(c) 30
(d) 10

Answer : A

Question. Vaishali saves Rs. 35 every week to buy a game costing Rs. 510. Which expression below shows the amount left for her to save after n weeks?
(a) (510 - 35)n
(b) 35n - 510
(c) 510 - 35n
(d) (510 + 35)n

Answer : C

Question. The ratio of Neha's age to that of Jane is 4:7 and the ratio of Jane's age to that of Smita is 4:3. If Smita is 21 years old, how old is Neha?
(a) 4
(b) 16
(c) 21
(d) 28

Answer : B

Question. The angles of a triangle are in the ratio 2 : 5 : 2. What kind of triangle will it be?
(a) Right angled, Isosceles
(b) Obtuse angled, Isosceles
(c) Obtuse angled, Scalene
(d) Acute angled, may be isosceles or scalene

Answer : B

Question. (1 + 3/4 ) × k = 1
Here k stands for the rational number,
Then value of k is ?
(a) 4/3
(b) -3/4
(c) 3/1
(d) 4/7

Answer : D

Question. The number of pencils in Ketan's box is 6 more than the number of rulers in it. If the number of pencils in his box is P and the number of rulers R, which of the following is true?
(a) R + 6 = P
(b) P + 6 = R
(c) 6R  = P
(d) 6P = R

Answer : A

Question. Which of the following could be the correct relation between x and y?

(a) y = 2x + 1
(b) y = 2x  - 1
(c) y = 3x  - 2
(d) y = 4x  - 3

Answer : D

Question. While solving an equation of the form x + m = n (where m and n are constants), Ranjana made a mistake and added m to n instead of subtracting it. By how much would her answer differ from the correct one?
(a) 2m
(b) m + n
(c) m -  n
(d) n -  m

Answer : A

Question. Hema has weighing scales with a removable pan. One day, she adjusts it as shown below and then weighs a bag of flour:
How much did the bag of flour weigh?

(a) 1 kg 50 g
(b) 1 kg 400 g
(c) 1 kg 500 g
(d) 1 kg 600 g

Answer : B

Question. On being asked her age, Shalu replies, ’My brother was born 2 years before me and my sister 4 years after me and the sum of their ages is 30 years.’
How old is Shalu?
(a) 12 years
(b) 14 years
(c) 16 years
(d) can't say

Answer : C

Question. By how much will the sum of the numbers in the 20th row exceed the sum of the numbers in the 15th?

(a) 5
(b) 25
(c) 75
(d) 125

Answer : D

Question. Akhil's office in a high-rise building was on a floor that had as many floors above it as below. One day, he went up 7 floors from his office, then down 4 floors and finally up 9 floors. If he was at the top floor now, how many floors did the building have in all?

(a) 53
(b) 41
(c) 39
(d) 25

Answer : D

Question. Five numbers, when arranged in ascending order, form a series in which the difference between each number and the number next to it is 7. If 8 and 36 are two of those numbers, which one of the following could be one of the other three numbers?
(a) 14
(b) 27
(c) 29
(d) 35

Answer : C
 

Please click the below link to access CBSE Class 8 Mathematics Worksheet - Rational Numbers (6)