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UNIT TEST

Unit test · Ch 12: Tales by Dots and Lines

20marks
11questions
60%to pass
4checks left

Solve every question in your notebook, then upload clear photos of every page. AI checks them like a CBSE examiner, with step marks. Pass with 60% to complete this test and unlock the Periodic Test.

Series RTEQ.P. Code 16/0/0
Roll No.

RTE LEARN · CBSE PATTERN 2026–27

MATHEMATICS

Unit test · Ch 12: Tales by Dots and Lines

Time allowed : 40 MinutesMaximum Marks : 20

General Instructions :

Read the following instructions carefully and follow them :

(i)This question paper contains 11 questions. All questions are compulsory.
(ii)This question paper is divided into three sections – A, B and C.
(iii)In Section A, Question numbers 1 to 5 carry 1 mark each.
(iv)In Section B, Question numbers 6 to 8 are very short answer (VSA) type questions carrying 02 marks each.
(v)In Section C, Question numbers 9 to 11 are short answer (SA) type questions carrying 03 marks each.
(vi)Draw neat figures wherever required. Take π = 22/7 wherever required, if not stated.
(vii)Use of calculators is not allowed.

SECTION A

This section comprises 5 questions of 1 mark each.

1.
What is the formula for the mean of a dataset?
1
2.
For two numbers, where does the mean lie?
1
3.
What type of graph is best for showing data changes across time?
1
4.
If every value in a dataset is increased by a fixed number k, what happens to the mean?
1
5.
What does the spreadsheet formula =SUM(B3:G3) calculate?
1

SECTION B

This section comprises 3 very short answer (VSA) type questions of 2 marks each.

6.
If every value in a dataset is multiplied by 5, and the original mean was 6, find the new mean.
2
7.
Coach Balwan recorded 10 wrestler weights with a mean of 39.2 kg. Nine weights sum to 349 kg. Find the missing weight.
2
8.
The mean of a dataset with 15 values is 134. Find the sum of the data.
2

SECTION C

This section comprises 3 short answer (SA) type questions of 3 marks each.

9.
Find the median of: 8, 10, 19, 23, 26, 34, 40, 41, 41, 48, 51, 55, 70, 84, 91, 92 (16 values), showing your method.
3
10.
A class of 24 students has an average height of 150.2 cm measured WITH shoes that add 1 cm to each measurement. Find the correct average height without shoes, explaining your reasoning.
3
11.
Explain, using algebra, what happens to the mean of n values when a fixed number k is subtracted from every value.
3

✦ ✦ ✦

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An example of what the app shows after checking. Each answer gets step marks and a short comment:

Q6 · 2/2Full marks. Correct method and the final answer is clearly stated.
Q7 · 1/2Right approach, but one step of working is missing. Show every step to get full marks.
Q8 · 2/2Well explained, with correct units and a neat diagram.
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