Page 34 - CT&AI_CLasa_7_Part_1

cbse handbook questions

Tick ( ) the correct option.
1. Form the largest four-digit odd number by 4. The given grid is to be filled with distinct single-
selecting exactly one digit from each row and digit natural numbers such that:
each column. What is the sum of the digits?
• The sum of each row is the same and is an
7 4 5 3 even number

6 9 2 6 • The larger number in each column is
placed in the red block
5 1 3 2
What is the sum of the numbers in the white
8 9 7 4 blocks?

(a) 21 (b) 22 7

(c) 23 (d) 24 4 8
2. Each square of the given puzzle must be filled
with a single-digit natural number such that: (a) 16 (b) 17
• The sum of all four different digits in each
row and each column is 10 (c) 15 (d) 20
• All the inequality signs (< and >) between
the boxes must be followed 5. Given below is a 3 x 3 grid to be filled by num-
Find the correct values of A and B. bers from 1 to 9 such that:
• Every pair of adjacent digits in a row should
1 4
have a difference of three
2 B A • Some of the numbers have already been
placed
3
Based on the given conditions, choose the
2 correct option.

(a) A = 3, B = 4 (b) A = 2, B = 1 1

(c) A = 1, B = 4 (d) A = 3, B = 1 5
3. How many cells contain a digit equal to the 9
sum of all the other digits in its corresponding
row and column combined? (a) A row can have all numbers as

3 6 even
1 2 3 (b) A row can have all numbers as odd
4 2

5 1 (c) A row can have 2 even and 1 odd
number
(a) 2 (b) 3
(d) All of these
(c) 4 (d) 5

Answers

1. (c) 2. (d) 3. (c) 4. (a) 5. (c)

32 Computational Thinking-7 (Mathematics)