Page 44 - CT&AI_CLasa_7_Part_1

Operations with

2 integers

computational thinking quest

Tick ( ) the correct option.

1. A grid with several numbers is provided below. (income) that can be included in the budget,
Follow the steps outlined until all numbers are while ensuring that the total sum is still zero?
struck. (Critical Thinking)

Step 1: Circle any number in the magic number (a) 1 (b) 2
grid.
(c) 4 (d) 5
Step 2: Strike out the row and the column
containing that number. 3. If S is the sum of integers from –100 to 102,
find S. (Pattern Recognition)
Step 3: Circle any unstruck number.

When there is no unstruck number, stop. (a) 0 (b) 203
Multiply the circled numbers. What answer
(c) 102 (d) 201
do you get? (Algorithmic Thinking)
4. You have a set of 50 integers. If the product
9 -18 27 -36 of any 3 integers in the set is negative, what
is the maximum number of positive integers
-6 12 -18 24
that could be in the set? (Logical Thinking)
4 -8 12 -16
(a) 0 (b) 1
-5 10 -15 20
(c) 2 (d) 3
(a) 25230 (b) 24920 5. A fish is at 20 m below sea level. It sees a
worm at 5 m below see level. To eat the worm,
(c) 25920 (d) 25000 the fish must move: (Analytical Thinking)

2. You are balancing a budget for a community (a) –15 m above
project. You have five different amounts of
money, and the total sum of all the amounts (b) 15 m above

is zero. Some amounts are positive (income) (c) 15 m below
and some are negative (expenses). What is
the maximum number of positive amounts (d) 25 m above

42 Computational Thinking-7 (Mathematics)