Computational Thinking

Sentences can also be palindromes, if you ignore spaces, commas, full stops and question marks.
E.g.:

BORROW OR ROB?
NO LEMON, NO MELON.
STEP ON NO PETS.
MR.OWL ATE MY METAL WORM.

What word will you fill in the blank to make the sentence below a palindrome?

WAS IT A ____ I SAW?

• 1. STAR

• 1. CAT

• 1. TART

• 1. WOW

Given below is the map of a city zone that has four parking slots

- A,B,C and D.

A car entering this zone is given the following set of directions:

1. Start

2. Take the third right

3. Take the first right

4. Take the first left

5. Take the first right again

6. Parking is to your right side

If the car correctly follows these directions, in which parking slot will it park??

(Note: Right side = direction of right hand while driving; Left side = direction of left hand while driving)

• 1. A

• 1. B

• 1. C

• 1. D

Rohan lives in an apartment on the 29th floor and he loves running down the stairs. Every morning, he likes to step out of his house by taking the elevator down to another floor and then climbing down the remaining floors on the stairs. To make it more fun, he decides to apply the following rules on deciding which floor to exit the elevator at:

Rule 1: Never repeat a floor until he has exited at all floors

Rule 2: Never exit at an even-numbered floor if he exited at an even-numbered floor the previous day

Rule 3: Never exit at an odd-numbered floor if he exited at an odd-numbered floor the previous day

Rule 4: The digit in the tens place of the floor number cannot be the same as the previous day's.

Which of the following COULD be a list of floors he exits the elevator at in the first week?

• 2, 13, 8, 23, 22, 7, 12

• 13, 28, 7, 18, 21, 2, 17

• 18, 27, 12, 3, 15, 30

• 19, 4, 17, 22, 17, 6

Rohan lives in an apartment on the 29th floor and he loves running down the stairs. Every morning, he likes to step out of his house by taking the elevator down to another floor and then climbing down the remaining floors on the stairs. To make it more fun, he decides to apply the following rules on deciding which floor to exit the elevator at:

Rule 1: Never repeat a floor until he has exited at all floors

Rule 2: Never exit at an even-numbered floor if he exited at an even-numbered floor the previous day

Rule 3: Never exit at an odd-numbered floor if he exited at an odd-numbered floor the previous day

Rule 4: The digit in the tens place of the floor number cannot be the same as the previous day's.

Which rule would be violated if Rohan exits at the following floors from Sunday to Saturday of a week in the given order: 12, 23, 2, 15, 9, 22, 17?

• Rule 1

• Rule 2

• Rule 3

• Rule 4

3 boxes are shown below.

• One of them has only apples.

• One of them has only oranges.

• One of them has both apples and oranges.

ALL 3 boxes are labelled incorrectly.

Seeta picks up a fruit from Box III and it turns out to be an orange.

Which of these should be the correct labelling of the boxes (from left to right)?

• Apples, Oranges, Apples and Oranges

• Apples and Oranges, Apples, Oranges

• Oranges, Apples and Oranges, Apples

• Oranges, Apples, Apples and Oranges

An algorithm is a list of steps to solve a problem or perform some task. E.g. an algorithm to make a cup of tea is - take 1/2 a cup of water, let it boil, add tea-leaves, add 1/2 cup milk, boil again and strain into a cup.

Given on the right is an algorithm that takes a number 'a' as input and returns an output based on some conditions.

Which is following statements is always true about the algorithm?

1. It always returns an even number

2. It always returns an odd number

3. If the input is even, it returns an odd number

4. If the input is odd, it returns an even number

• Only 1

• Only 2

• Only 3 and 4

• Only 1 and 4

• A

• B

• C

• D

• A

• B

• C

• D

• A

• B

• C

• D