CBSE Class 8 Mathematics Tales by Dots and Lines MCQs Set 07

Question. All values are reduced by 1. The mean will
(a) Decrease by 1
(b) Increase by 1
(c) Stay same
(d) Decrease by 2

Answer: A

Question. Column headers in a spreadsheet are labelled as
(a) 1, 2, 3
(b) A, B, C
(c) Red, Blue
(d) Name, Age

Answer: B

Question. Rameswaram gets its most rain during
(a) Summer
(b) June
(c) October to December
(d) February

Answer: C

Question. Manoj uses a strip of paper with 48 boxes to record his
(a) Marks
(b) Daily activities
(c) Family names
(d) Heights

Answer: B

Question. Number of family members in a class is data. To find average family size we use
(a) Only names
(b) Frequencies
(c) Only marks
(d) Dates

Answer: B

Question. A steep line segment in a graph means the increase is
(a) Very less
(b) Zero
(c) Greater
(d) Slow

Answer: C

Question. After age 50, average sleep time typically
(a) Becomes zero
(b) Increases a bit
(c) Decreases a lot
(d) Stops

Answer: B

Question. Median is the middle value when the data is
(a) Very big
(b) Mixed up
(c) Sorted
(d) All same

Answer: C

Question. Kerala maximum temperature trend throughout the year is
(a) Changing a lot
(b) Very high in winter
(c) Mostly flat
(d) Very low in summer

Answer: C

Question. In Manoj's activity strip, each box represents
(a) 1 hour
(b) 30 minutes
(c) 15 minutes
(d) 2 hours

Answer: B

Question. If we pick a centre larger than the mean, the distances on the RHS will
(a) Increase
(b) Stay same
(c) Decrease
(d) Double

Answer: C

Question. A steeper line segment in a line graph means the increase is
(a) Very less
(b) Zero
(c) Greater
(d) Slow

Answer: C

Question. Average harvest per tree is 25.6 for 15 trees. Total harvest is
(a) 25.6
(b) 15
(c) 384
(d) 400

Answer: C

Question. A line graph looks like a smooth curve when it has
(a) No dots
(b) Many dots close together
(c) Only 2 dots
(d) Big gaps

Answer: B

Question. Average of two even numbers is always
(a) Odd
(b) Even
(c) Zero
(d) Prime

Answer: B

Question. A number occurs 11 times. This number 11 is called
(a) Mean
(b) Median
(c) Frequency
(d) Total

Answer: C

Question. As we grow from children to adults, sleep time typically
(a) Increases
(b) Decreases
(c) Stays at 12 hours
(d) Becomes zero

Answer: B

Question. A value greater than the mean is added. The new mean will
(a) Decrease
(b) Increase
(c) Stay same
(d) Become half

Answer: B

Question. Middle value when data is sorted is called
(a) Mean
(b) Average
(c) Center
(d) Median

Answer: D

Question. A count was incorrectly noted as 3 more than actual. To get the right total, we must
(a) Add 3
(b) Multiply by 3
(c) Subtract 3
(d) Divide by 3

Answer: C